a car’s bumper is designed to withstand a 3.00–km/h (0.833–m/s) collision with an immovable object without damage to the body of the car. the bumper cushions the shock by absorbing the force over a distance. calculate the magnitude of the average force on a bumper that collapses 0.200 m while bringing a 1050–kg car to rest from an initial speed of 0.833 m/s.
Answers
The average force on the bumper is 1821.455 Newtons.
Assuming there is no friction from the ground on the car that leads us to think the only restrictive force that acts on the car is the force on the bumper, we can think of the energy conversion during the collision.The car's kinetic energy just before it undergoes the collision is expended against the work done on the car through the bumper by the force that acts upon the bumper that takes the car to rest eventually.The kinetic energy the car had can be calculated as follows,\(\begin{aligned}\\\text{kinetic energy} &= \small \frac{1}{2}mv^2\\\\&=\small \frac{1050\,kg\times (0.833\,m/s)^2}{2}\\\\&=\small 364.291\,kg\,m^2/s^2\end{aligned}\)
Note that the answer is kept in 3 decimals.The work done on the car by the force on it is as follows,\(\begin{aligned}\\\text{work on the car} &= \small Fs\\\\&=\small F\times 0.200\,m\\\\&=\small 0.200F\, m\end{aligned}\)
These 2 quantities are equal as per the explanation and therefore,\(\begin{aligned}\\\small 0.200F \,m &=\small 364.291\,kg\,m^2/s^2\\\\\small F &=\small 1821.455\, N\end{aligned}\)
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Related Questions
Newton’s first law of motion states that an object's motion remains the same unless a force acts upon it. What would be an example of this law in action?
Answers
Answer:
A driver breaks suddenly and the passengers are flung forward
Bianca is studying to become a biologist. She leans toward liberal politics, is currently engaged, and is Irish American. She considers herself a good athlete and an extrovert, and she participates in intramural sports. These characteristics are part of Bianca's ______.
Answers
These characteristics are part of Bianca's personal identity and interests. Bianca's multifaceted identity includes her pursuit of biology, liberal politics, engagement, Irish American heritage, athleticism, and extroversion.
What category do these characteristics belong to in Bianca's life _________?Bianca's personal identity encompasses the various characteristics that define who she is as an individual. In this context, her leaning toward liberal politics, being engaged, and being Irish American contribute to her personal identity. Additionally, her passion for studying biology, considering herself a good athlete and an extrovert, and participating in intramural sports further shape her personal identity.
Personal identity refers to the unique combination of traits, beliefs, values, and affiliations that make each person distinct. It encompasses various aspects such as cultural background, political beliefs, personal interests, and relationships. These characteristics collectively contribute to how Bianca perceives herself and how others perceive her.
Understanding personal identity is essential for self-awareness and developing a sense of belonging and purpose. It allows individuals to explore their values, interests, and goals, shaping their choices and experiences.
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Based on what you learned about astronomy from space, select all of the correct statements from the following list.
The Compton, Chandra and Spitzer telescopes are all examples of space telescopes.
Most types of electromagnetic waves are not visible to ground-based telescopes.
Enough infrared energy gets to Earth's surface that infrared telescopes do not need to be put in orbit.
Cosmic rays are the absolute highest-energy type of electromagnetic wave.
The Hubble Space Telescope makes observations at all wavelengths.
Earth's atmosphere has no effect on visible light, so there is no need to place an optical telescope in space.
Answers
All for the sattement A, B, and E is True and satement C, D, and F is False where you learned about astronomy from space.
A .The Compton, Chandra and Spitzer telescopes are all examples of space telescopes.
-This statement is True.
B. Most types of electromagnetic waves are not visible to ground-based telescopes.
-This statement is True.
C. Enough infrared energy gets to Earth's surface that infrared telescopes do not need to be put in orbit.
-This statement is False.
D. Cosmic rays are the absolute highest-energy type of electromagnetic wave.
-This statement is False.
E. The Hubble Space Telescope makes observations at all wavelengths.
-This statement is True.
F. Earth's atmosphere has no effect on visible light, so there is no need to place an optical telescope in space.
-This statement is False.
Astronomy is the scientific study of celestial objects and phenomena, including stars, planets, galaxies, and the universe as a whole. Astronomers use various tools and techniques, such as telescopes, spectroscopy, and astrophysics, to observe and understand the properties and behavior of these celestial objects.
Through the study of astronomy, scientists have discovered many fascinating things about the universe, such as the existence of black holes, the age and size of the universe, and the formation and evolution of stars and galaxies. Astronomy has also played a significant role in advancing our understanding of fundamental physics, including the laws of gravity and the behavior of matter and energy at extreme conditions.
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A fullback is running down the football field in a straight line. He starts at the 0-yard line at 0 seconds. At 1 second, he is on the 10-yard line; at 2 seconds, he is at the 20-yard line; at 3 seconds, he is at the 30-yard line; and at 4 seconds, he is at the 40-yard line. This is evidence that _____
a.) he is accelerating
b.) he is moving with a constant speed (on average)
c.) he is covering a greater distance in each consecutive second
Answers
Answer:
Option (b) he is moving with a constant speed (on average)
Explanation:
To know which option is correct, let us calculate the speed at each time.
Case 1:
Distance = 10 yard
Time = 1 s
Speed =?
Speed = distance / time
Speed = 10 / 1
Speed = 10 yard/s
Case 2:
Distance = 20 yard
Time = 2 s
Speed =?
Speed = distance / time
Speed = 20 / 2
Speed = 10 yard/s
Case 3:
Distance = 30 yard
Time = 3 s
Speed =?
Speed = distance / time
Speed = 30 / 3
Speed = 10 yard/s
Case 4:
Distance = 40 yard
Time = 4 s
Speed =?
Speed = distance / time
Speed = 40 / 4
Speed = 10 yard/s
From the calculations made above, we can see clearly that the speed at each case is the same i.e constant. This is true because he is covering the same distance with respect to time.
This also means that the footballer is not accelerating as his speed remains the same i.e constant.
Thus, option B gives the correct answer to the question.
a ball is thrown straight upwards with an initial speed of vo. when it reaches the top of its flight at height h, a second ball is thrown straight upwards with the same initial velocity
Answers
A ball is thrown straight upward with an initial speed v₀. When it reaches the top of its flight at height h, a second ball is thrown straight upward with the same initial speed. The balls cross paths at height 1/2h.
To determine whether the two balls cross paths at a height of 1/2h, above 1/2h, or below 1/2h, we need to consider the motion of the balls.
When the first ball is thrown straight upward with an initial speed v₀, it will reach a maximum height and then fall back down due to the force of gravity. The time it takes for the ball to reach the top can be calculated using the equation:
t = v₀ / g
where t is the time, v₀ is the initial velocity, and g is the acceleration due to gravity.
Now, let's consider the motion of the second ball. When it is thrown straight upward with the same initial speed v₀, it will also follow the same trajectory. However, it will start its motion at the top of its path where the first ball reached its maximum height.
Since both balls have the same initial speed and start at the same height, the second ball will take the same amount of time to reach the height 1/2h as the first ball took to reach its maximum height.
Therefore, the second ball will cross paths with the first ball at a height of 1/2h.
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The complete question is:
A ball is thrown straight upward with an initial speed v₀. When it reaches the top of its flight at height h, a second ball is thrown straight upward with the same initial speed. Do the balls cross paths at height 1/2h, above 1/2h, or below 1/2h
A 1500kg car moves foward with 30kg•m/s of momentum. What is its velocity
Select one
•-1470m/s
•0.02m/s
•45,000m/s
•-50m/s
Answers
Answer:
v = 30 /1500= 0.02 m/s
................
A 0.045-kg golf ball is dropped from rest. Is dropped from a height of 1.3m and comes back up at a height of .7m
Answers
The time to drop from 1.3m and velocity after height at 0.7 mis mathematically given as
t1 = 0.515 sec
v0 = 3.7m/s
What is the time to drop from 1.3m and velocity after height at 0.7?Question Parameters:
A 0.045-kg golf ball is dropped from rest.
Is dropped from a height of 1.3m and comes back up at a height of .7m
Generally, the equation for the time to drop from 1.3m is mathematically given as
yf - yi = vi t + a t^2/ 2
Therefore
0 - 1.3 = 0 - 9.8 t^2 /2
t1 = 0.515 sec
Hence, after its max height is 0.7 m,
vf^2 - vi^2 = 2 a (yf - yi)
0^2 - (v0)^2 = 2(-9.8)(0.7 - 0)
v0 = 3.7m/s
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6. You have a long metal rod and a hammer.
How would you hit the metal rod to create a
longitudinal wave? How would you hit it to
create a transverse wave?
Answers
Hitting the metal rod parallel to its axis will produce a longitudinal wave. By striking the rod perpendicular to its axis, you can produce a transverse wave.
How can you create a longitudinal wave using a long spring?By compressing the coils in a tiny area and then releasing the compressed area, a stretched spring can create a longitudinal wave. The disruption will then continue to spread as a longitudinal pulse.
Is it feasible for a rod to have longitudinal waves?We know that rarefaction happens in a longitudinal wave. Compression won't occur since a stretched string is inelastic and incompressible. Hence, a stretched string's longitudinal wave.
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You have a parallel-plate 5.29x10
F capacitor that is charged to 0.00859 C. While the capacitor is isolated, you change the plate separation so that the capacitance becomes 1.85x10
F. How much work do you perform in this process?
Answers
The work done in this process will be equal to the initial potential energy of the capacitor minus the final potential energy of the capacitor.
Given, Capacitor has charge q = 0.00859
Capacitance, C₁ = 5.29 × 10⁻⁸ F (Initial Capacitance)
Capacitance, C₂ = 1.85 × 10⁻⁸ F (Final Capacitance)
We know that the potential energy of a capacitor is given by the equation;
U = (1/2)Q² / C
Where Q is the charge on the capacitor, and C is the capacitance of the capacitor.
Initial potential energy of the capacitor,
U₁ = (1/2) × 0.00859² / 5.29 × 10⁸
U₁ = 7.009 J
Final potential energy of the capacitor,
U₂ = (1/2) × 0.00859² / 1.85 × 10⁻⁸
U₂ = 32.614 J
The work done in this process will be equal to the initial potential energy of the capacitor minus the final potential energy of the capacitor.
Work done, W = U1 – U2= 7.009 - 32.614= -25.605 J (Negative because the work is done by the system).
The work done in the given process is -25.605 J.
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If a plane traveling down a runway at 75 m/s accelerates at a rate of 8 m/s’over
40 seconds, then what is its final velocity?
Answers
Answer:
395 m/s
Explanation:
Initial velocity (u) = 75 m/sAcceleration (a) = 8 m/s²Time taken (t) = 40 secondsBy using the first equation of motion,
❖ v = u + atv denotes final velocityu denotes initial velocitya denotes accelerationt denotes time→ v = 75 + 8(40)
→ v = 75 + 320
→ v = 395
→ Final velocity = 395 m/sA spring-loaded ballistic cart measuring 470 g is in contact with a second 640 g cart. The carts are initially at rest on a level surface. The spring is released and the lighter cart is observed to move at +0. 83 m/s afterward. What is the velocity of the other cart?
Answers
The spring is released and the lighter cart is observed to move at +0.83m/s afterward, the speed of the other cart is 1.296m/s.
What is the second cart's speed after the collision?In the event of an elastic collision, the final speeds of the carts will each be halved from their starting speeds. In a perfectly inelastic collision, the final velocity of the cart system will be halved from that of the moving cart's initial velocity.
What occurs if two carts collide with one another?If the masses and velocities of the two carts are equal, they will both come to rest after contacting the Velcro pads. This collision lost all of its kinetic energy because it was completely inelastic.
It is easy to calculate the after-collision velocity by dividing momentum by mass.
v = p/m
v = 0.83 /0.64
v = 1.296m/s.
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A car accelerates from rest at a constant rate of 3.5m/s^2. What is the velocity of the car 12s later?
Answers
1. Two 500 g point masses are rotating on a light frame at a radius of 0.1 m from a vertical axis. The angular speed of the system is 20 rad s-1. a a) What is the moment of inertia of the system about the axis? b) What is the angular momentum of the system about the axis? c) If the masses were pulled into a radius of 0.05 m by an internal radial force, what would the angular momentum of the system now be? d) What is the new angular speed of each mass? e) By how much did the energy of the masses change?
Answers
(a) The moment of inertia of the system about the axis can be calculated using the formula for the moment of inertia of a point mass rotating about an axis.
(b) The angular momentum of the system about the axis can be determined by multiplying the moment of inertia by the angular speed.
(c) If the masses are pulled into a smaller radius, the moment of inertia will change, resulting in a new angular momentum for the system.
(d) The new angular speed of each mass can be calculated using the principle of conservation of angular momentum.
(e) The change in energy of the masses can be determined by comparing the initial and final kinetic energies of the system.
(a) To calculate the moment of inertia of the system about the axis, we consider the two point masses rotating at a given radius. The moment of inertia for each point mass is given by the formula I = m * r², where m is the mass and r is the radius.
Since there are two masses, we can calculate the total moment of inertia by summing the individual moments of inertia.
(b) The angular momentum of the system is determined by multiplying the moment of inertia by the angular speed. Using the formula L = I * ω, where L is the angular momentum, I is the moment of inertia, and ω is the angular speed, we can find the angular momentum of the system.
(c) If the masses are pulled into a smaller radius, the moment of inertia will change. We can calculate the new moment of inertia using the same formula as in (a) but with the new radius. With the new moment of inertia, we can determine the new angular momentum of the system.
(d) To find the new angular speed of each mass, we apply the principle of conservation of angular momentum. The initial angular momentum of the system is equal to the final angular momentum. By rearranging the equation L = I * ω and solving for ω, we can calculate the new angular speed.
(e) The change in energy of the masses can be determined by comparing the initial and final kinetic energies of the system. The initial kinetic energy is given by (1/2) * I * ω², where I is the initial moment of inertia and ω is the initial angular speed.
Similarly, the final kinetic energy can be calculated using the new moment of inertia and angular speed. The difference between the initial and final kinetic energies represents the change in energy of the masses.
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Help with 7 - 9 please!
Answers
Answer:
Try lookin those questions up on Brainly
Explanation:
a concave mirror produces a virtual image that is 6 times as tall as the object. if the object is 4 cm in front of the mirror, what is the focal length of this mirror
Answers
The focal length of the concave mirror will be 4.8 cm.
The focal length of the lens is length of the distance between the middle of the lens to the focal point.
It can be find out using the following lens formula as,
= 1/f = 1/v + 1/u
Here, (v) is the distance of the image, (u) is the distance of the object, and (f) is the focal length of the lens.
Here, the concave mirror produces a virtual image that is 6 times as large as the object. The object is 4 cm in front of the mirror, and the concave mirror produces a virtual image that is six times as large as the object.
Hence, the value of magnification (m) of the mirror is 6.
The object distance is 4 cm thus the image distance, using the magnification formula, can be given as,
= m = v/u
= v = m X u
= v = 4 X 6
= v = 24 cm
Put the values in the lens formula as,
= 1/f = 1/v + 1/u
= 1/f = 1/24 + 1/4
= 1/f = (1 + 6) / 24
= 1/f = 5/24
= f = 24 /5
= f = 4.8 cm
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What happens to the period of a wave as the frequency increases?.
Answers
Explanation:
T=1/f
So if frequency increases the period will decrease
Gas to liquid with explanation on the basis of kinetic model and condensation point.
Answers
Answer:
Explanation:
1)Melting:
Melting is the process by which a substance changes from the solid phase to the liquid phase. ... Melting occurs when the internal energy of a solid increases, usually through the application of heat or pressure, such that the molecules become less ordered.
2) liquefication:
In physics and chemistry, the phase transitions from solid and gas to liquid (melting and condensation, respectively) may be referred to as liquefaction. The melting point (sometimes called liquefaction point) is the temperature and pressure at which a solid becomes a liquid.
3) vaporization:
Vaporization, conversion of a substance from the liquid or solid phase into the gaseous (vapour) phase. If conditions allow the formation of vapour bubbles within a liquid, the vaporization process is called boiling. Direct conversion from solid to vapour is called sublimation.
4) Sublimation occurs as molecules of a substance in the solid state go to the vapor state directly, rather than through the liquid state. ... ⭕In terms of the kinetic molecular theory, we know that molecules are in constant random motion, even when the substance is below the melting point.
A body fell freely for 6s.From what height did it start to fall and what was it's speed at the end of the fall?
Answers
Answer:
Free fall / falling speed equations1. The force of gravity, g = 9.8 m/s2 Gravity accelerates you at 9.8 meters per second per second. ...
2. Time to splat: sqrt ( 2 * height / 9.8 ) ...
3. Velocity at splat time: sqrt( 2 * g * height ) ...
4. Energy at splat time: 1/2 * mass * velocity2 = mass * g * height.
Explanation:
The fact that solar systems only generate electricity during the day is typically not a problem because
Answers
The fact that solar systems only generate electricity during the day is typically not a problem because of the presence of energy storage systems.
Solar energy can be captured during the day, and the excess power can be stored in batteries for later use. Therefore, solar systems can still provide power even when there is no sunlight available.
The energy stored in the batteries during the day can be utilized at night when the sunlight is not available. A backup generator or connection to the power grid can also be used as a backup for energy needs when there is no sunlight available.
Another way to solve this problem is by placing solar panels in different locations and different angles. This will increase the total output of the system, especially during times when the sun is low in the sky.
Also, it's important to note that solar systems generate more electricity during the daytime when the energy demand is high. This is an excellent way to reduce the demand for fossil fuel-based power plants, which can cause environmental problems.
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nilai x
Hitung
3^x2 x 3^5x
= 3^24
Answers
Answer:
x = - 8 atau 3
Explanation:
3ˣ² × 3⁵ˣ = 3²⁴
Penarikan:
Mᵃ × Mᵇ = Mᵃ⁺ᵇ
3ˣ² × 3⁵ˣ = 3ˣ²⁺⁵ˣ
Karena itu
3ˣ² × 3⁵ˣ = 3²⁴
3ˣ²⁺⁵ˣ = 3²⁴
x² + 5x = 24
Mengatur kembali
x² + 5x - 24 = 0
Pemecahan dengan faktorisasi
x² - 3x + 8x - 24 = 0
x (x - 3) + 8 (x - 3) = 0
(x + 8) (x - 3) = 0
x + 8 = 0 atau x - 3 = 0
x = - 8 atau x = 3
Karena itu,
x = - 8 atau 3
Heat from a fire warming your hands is an example of
Answers
Answer:
Thermal energy is the total kinetic energy of moving particles of matter, and the transfer of thermal energy is called heat. Thermal energy from the bonfire is transferred to the hands by thermal radiation. ... This is how the fire warms the hands of someone sitting near the bonfire.May
Answer:
Thermal Radiation
Explanation:
Type of heat transfer Hope this helped <3
6Cx = -105 m and Cy = -88.2 mFind the direction of the vector.
Answers
Given data
The vector in the x-direction is Cx = -105 m
The vector in the y-direction is Cy = - 88.2 m
The expression for the direction of the vector is given as:
\(\theta=\tan ^{-1}(\frac{C_y}{C_x})\)Substitute the value in the above equation.
\(\begin{gathered} \theta=\tan ^{-1}(\frac{-88.2\text{m}}{-105\text{ m}}) \\ \theta=40^o \end{gathered}\)Thus, the direction of the vector is 40 degrees.
A downward force of magnitude 5 n is exerted on the book by the force of.
Answers
Answer:
Gravity (perhaps)
Explanation:
Without a further description or a diagram, I would guess the downward force would be gravity.
Gravity exerts a downward pull on the book with a magnitude of 5 n. the correct answer would be option (A) gravity.
What is the force by gravity?The attraction that the earth, moon, or other immensely big object has on another object is referred to as gravity. By definition, this is the object's weight. Gravity affects all items on Earth and is directed "downward" towards the earth's center. On Earth, gravity gives physical objects weight, while the Moon's gravity causes sublunar tides in the seas (the corresponding antipodal tide is caused by the inertia of the Earth and Moon orbiting one another).
Gravity also plays a significant role in biology, such as regulating plant development through gravitropism and controlling fluid circulation in multicellular animals.
According to research into the consequences of weightlessness, gravity may have a role in immune system function and cell differentiation inside the human body.
Thus, Gravity exerts a downward pull on the book with a magnitude of 5 n.
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The complete question would be as:
A downward force of magnitude 5 n is exerted on the book by the force of downward force of magnitude 5 n is exerted on the book by the force of the table.
A. gravity
B. inertia
C. momentum
D. acceleration
a 74-kg base runner begins his slide into second base when he is moving at a speed of 4.8 m/s. the coefficient of friction between his clothes and earth is 0.70. he slides so that his speed is zero just as he reaches the base.
Answers
The work energy of speed is
1304.2 .
What is work energy?
work energy is the most fundamental quantity of physics . Work is said to be done when a force applied to an object cause a displacement of a object.
Solution -
As per the given-
Mass of runner m = 74kg
Initial velocity of runner u=4.8 m/s
Final velocity of runner v =0
Coefficient of friction ¥=0.7
Let's d be the distance moved by runner till the stop.
a- mechanical energy lost due to friction
As friction does negetive work causing the runner to stop.
As we know,
Mechanical energy lost= Kinetic energy of runner
Mechanical energy lost =
1/2 mv^2 = 1/2 ×74×4.8^2=852.2
Distance move by runner-
Work done by friction = mechanical energy lost
-¥×mg×d =852.2 j
-0.7×74×9.8×d = -491.2
Solving the equation we get
1304.2.
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Oz discusses his work in the circus in the wonderful wizard of oz. he tells them about the ventriloquists in the circus. what is a ventriloquist?
Answers
a person who alters their voice to make it seem as though the sound is coming from somewhere else, typically a puppet is a ventriloquist.
Which ventriloquist was the best?Jimmy Nelson, an American ventriloquist who performed on television in the 1950s and 1960s, was born on December 15, 1928.
What makes it a ventriloquist?The incorrect but long-held notion that the voice came from the stomach is explained by the word ventriloquism's Latin roots, ventri (belly) and loquor (to talk).
Why is a ventriloquist good?Making your puppet seem lifelike and honing your voice are essential for becoming a competent ventriloquist. To divert attention from yourself, keep moving the body, arms, and head of the creature. To assist people forget that your puppet is actually you, try to make the character as different from you as you can.
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Answer: someone who speaks without moving his lips and protects his voice to make it seem as if it is coming from someone or something else.
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When work is done by a system, does the internal energy of the system increase or decrease?
Answers
Decrease
Explanation:The mathematical relationship between heat, internal energy and work done by the system is given as:
△U = Q + W
where △U is the change in the internal energy
W is the workdone by the system
Q is the heat energy in the system
Since the workdone by the system is negative, when a system does work, there is a depletion in the amount of energy possessed by the system.
Due to this loss of energy by the system as a result of the workdone, the internal energy decreases.
A block with a mass of 6.0 kg is
held in equilibrium on an incline
of angle θ = 30.0° by a horizontal
force, F, as shown in the figure.
Find the magnitudes of the
normal force on the block and of F. (Ignore friction.)
Answers
(a) The normal force on the block is 50.92 N.
(b) The horizontal force on block keeping it in equilibrium is 29.4 N.
The given parameters;
mass of the block, m = 6 kgangle of inclination, θ = 30.0°The normal force on the block is calculated as follows;
\(F_n = W \times cos(\theta)\)
where;
W is the weight of the block\(F_n = mg \times cos(\theta)\\\\F_n = 6 \times 9.8 \times cos(30)\\\\F_n = 50 .92 \ N\)
The horizontal force on block keeping it in equilibrium is calculated as follows;
\(F- F_x = 0\\\\F-mgsin\theta= 0\\\\F = mgsin\theta\\\\F = 6 \times 9.8 \times sin(30)\\\\F = 29.4 \ N\)
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at what speed does a 1600 kg compact car have the same kinetic energy as a 20000 kg truck going 24 km/h ? express your answer in kilometers per hour.
Answers
A 1600 kilogram small vehicle and a 20 000 kg truck traveling at a speed of 84.74 km/h have same amounts of kinetic energy .
What causes kinetic energy to move?A particle or an item that is in motion has a sort of energy called kinetic energy. An item accumulates kinetic energy when work, which involves the transfer of energy, gets done on it by exerting a net force.
Briefing :
Kinetic energy is that which is due to the movement of bodies and is calculated like this:
K = (1/2)mv² Formula (1)
Data for the truck
m = 20000 kg
v = 24 km/h
= 24 *(1000m)/ (3600s)
v = 6.66m/s
Calculation of the kinetic energy of the truck
We replace data in the formula (1)
K = (1/2)mv²
K = (1/2)(20000)(6.66)²
K = 443556J
Data for the compact car
K = 443556 J
= 443556 (N*m)
m = 1600 kg
Calculation of the speed of the compact car
We replace data in the formula (1)
K = (1/2)mv²
443556 = (1/2)( 1600)(v)²
443556 = ( 800)(v)²
v² = 443556/ (800)
\(v=\sqrt{\frac{443556}{800} }\)
v = 23.54m/s
1 km = 1000 m
1 h = 3600 s
v =23.54*(3600/1000)km/h
v =84.74 km/h
Therefore , speed of car is is 84.74 km/h
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Who would benefit from using a topographic map? Check all that apply
Military
Hikers
Geologists
Submarine divers
Cross Country runners
Airplane Pilots
Answers
41. A statue weighs 1,000N and exerts a pressure of 20,000 Pa. How big is
the base of the statue in square meters?
please help
Answers
Answer:
The answer is 0.05 m²Explanation:
The area of the base of the statue can be found by using the formula
\(a = \frac{f}{p} \\ \)
f is the force
p is the pressure
From the question we have
\(a = \frac{1000}{20000} = \frac{1}{20} \\ \)
We have the final answer as
0.05 m²Hope this helps you