A 1. 5-kilogram cart initially moves at 2. 0 meters
per second. It is brought to rest by a constant net
force in 0. 30 second. What is the magnitude of
the net force?
(1) 0. 40 N (3) 10. N
(2) 0. 90 N (4) 15 N
Answers
The initial velocity of a 1.5-kilogram cart is 2.0 meters per second. It is brought to a stop in 0.30 seconds by a constant net force.To solve this problem, you must first recall the formula F = ma, where F is force, m is mass, and a is acceleration.
We can rearrange the formula to solve for force as follows:F = maWhere F is force, m is mass, and a is acceleration.We can use the formula to solve for force since we know the mass of the cart and its acceleration.First, we must calculate the acceleration, which can be found using the formula a = Δv / Δt, where a is acceleration, Δv is the change in velocity, and Δt is the time taken. We can substitute the values that we know into the equation:
a = Δv / Δt= (0 m/s - 2 m/s) / 0.30 sa = -2/0.3a = -6.67 m/s²
We obtained a negative acceleration because the velocity of the cart decreases during the time interval of 0.30 seconds.To determine the net force on the cart, we can now use the formula F = ma:F = ma= 1.5 kg x -6.67 m/s²= -10.0 N (approximately)Therefore, the magnitude of the net force on the cart is 10 N. Answer (3) is correct.
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Related Questions
A giant armadillo moving north word with a constant acceleration covers the distance between two points 60 m apart and six seconds its velocity as it passes the second point is 15 m/s
Answers
The acceleration is a = 1.7 m/s^2
\(v_{0}\)The rate at which the velocity of an item in motion changes is known as acceleration.
The sum of all the forces operating on an item, as specified by Newton's second law of motion, produces this value.
We need to know the initial and final velocities as well as the amount of time that has passed in order to calculate acceleration.
We must determine the initial velocity based on the supplied numbers. Some kinematic equations are utilized.
We do as follows:
\(x=v_{0}t + \frac{at^{2} }{2}\)
x = 60m
t=6 sec
60 = v0(6) + a(6)^2/2
60 = 6v0 + 18a {equation 1}
\(v_{f}=v_{0} + at\)
\(v_{f}\)= 15 m/s
15 = v0 + a(6)
15 = v0 + 6a {equation 2}
Solving for \(v_{0}\) and a,
\(v_{0}\) = 5 m/s
a = 1.7 m/s^2
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The acceleration is a = 1.7 m/s²
The rate at which the velocity of an item in motion changes is known as acceleration.
The sum of all the forces operating on an item, as specified by Newton's second law of motion, produces this value.
We need to know the initial and final velocities as well as the amount of time that has passed in order to calculate acceleration.
We must determine the initial velocity based on the supplied numbers. Some kinematic equations are utilized.
Evaluating the problem:
x=\(v_{0} t +\frac{at^{2} }{2}\)
x = 60m
t=6 sec
60 =\(v_{0} 6 + a6^{2} /2\)
60 = 6\(v_{0}\) + 18a {equation 1}
\(v_{f} = v_{0} +at\)
\(v_{f}\)= 15 m/s
15 = \(v_{0}\) + a(6)
15 = \(v_{0}\) + 6a {equation 2}
Solving for and a,
\(v_{0}\) = 5 m/s
a = 1.7 m/s^2
What is Newton's second law ?
Newton's second law is a quantitative description of the changes that a force can produce on the motion of a body. It states that the time rate of change of the momentum of a body is equal in both magnitude and direction to the force imposed on it.
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The small bunny exerts a force of 15 Newtons as it hops a distance of 3 meters to pass the large rabbit. How much work did the small bunny do?
45 Joules
0.2 Joules
18 Joules
5 Joules
Answers
Answer:
W = F × d
W = 15 × 3
W = 45 Joules
An ocean wave has a frequency of 3 waves per second, and the waves are
5 meters apart. What is the speed of the wave?
Answers
Answer:
v = λf = (4 m)(3 Hz) = 12 m/s
Explanation:
A bicycle starts from rest and begins accelerating at 1.2 ms. What is the distance traveled
by the bicycle after 3.3 seconds?
Answers
The distance traveled by the bicycle after 3.3 seconds would be approximately 6.534 meters ,when starts from rest and begins accelerating at 1.2 ms.
Which can be calculated using the equation of motion:
Distance = Initial velocity * Time + (1/2) * Acceleration * Time^2
Since the bicycle starts from rest, the initial velocity is 0 m/s. The acceleration is given as 1.2 m/s^2, and the time is 3.3 seconds.
Plugging in the values into the equation:
Distance = 0 * 3.3 + (1/2) * 1.2 * (3.3)^2
Distance = 0 + (1/2) * 1.2 * 10.89
Distance ≈ 6.534 meters
Therefore, the bicycle travels approximately 6.534 meters after 3.3 seconds.
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A student designed an experiment to investigate how emergency thermal blankets are used to keep a person warm in a cold environment. The student heated water on a hot plate until it reached a temperature of 100 0C. Equal amounts of the water were quickly transferred to identical containers. One of the containers was wrapped with a layer of aluminum foil and the other with clear plastic wrap. A thermometer was inserted into each container so that they touched only the water. After one hour of observation, the temperature of the water in the aluminum wrapped container was higher than the plastic wrapped container. Specific Heat Material J/kg/0C Aluminum 900 Plastic 1410 Based on the specific heat data, is the observation consistent with predicted results? Why or why not?
Answers
From the experiment, it is clear that the data is not consistent with the specific heat data.
What are emergency thermal blankets?Many times we could find ourselves out in the cold or in a very hot environment. Most especially when we find ourselves in the cold environment, there is the need to keep warm so that we can be able to maintain the normal body temperature.
The emergency thermal blankets is one of the materials that have been posited as able to maintain the temperature of the body and it is made of cheap plastic or polyethylene material.
We know that the material that has the higher specific heat should loose heat more slowly but this is shown not to be the case here.
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A horse trots at an average velocity of 17 m/s for 8 seconds. How far is the horse displaced?
Answers
speed of horse= 17m/s
total time = 8sec
displacement= velocity * time
=17*8
= 136
Therefore, in 8 sec horse traveled 136m.
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what does a high albedo indicate with regard to a planetary object?
Answers
A high albedo indicates that a planetary object reflects a significant amount of incoming sunlight back into space.
Albedo is a measure of the reflectivity of a surface. It quantifies the fraction of solar radiation that is reflected by an object compared to the total amount of radiation incident upon it. Albedo is expressed as a value between 0 and 1, where 0 represents a perfectly absorptive (dark) surface that reflects no light, and 1 represents a perfectly reflective (bright) surface that reflects all incident light. When a planetary object, such as a planet or moon, has a high albedo, it means that it reflects a large portion of the sunlight it receives. This indicates that the surface of the object is relatively bright and does not absorb much of the incoming solar radiation. Instead, it reflects a significant amount of light back into space.
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te. the electrons are emitted from the cathode with zero velocity, one velocity, or a range of velocities? explain.
Answers
When electrons are emitted from the cathode, they can have zero velocity, one velocity, or a range of velocities depending on the conditions under which they are emitted.
For example, in a vacuum tube, electrons are emitted from the cathode due to thermionic emission and they typically have a range of velocities.
However, in a photoelectric effect experiment, electrons are emitted from the cathode due to the absorption of photons and they typically have a well-defined velocity determined by the energy of the incident photons.
Similarly, in a field emission experiment, electrons are emitted from the cathode due to a high electric field and they typically have a high velocity.
Therefore, the velocity of the electrons emitted from the cathode depends on the mechanism of emission and the conditions under which they are emitted.
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A 7 kg ball of clay moving a 4 m/s to the right crashes into a not moving 5 kg ball of clay.
The balls of clay stick together.
The total momentum after the collision is __.
kg m/s.
Answers
Explanation:
28kgm/s
that is the answer
momentum is conserved
AP PHYSICS please answer
Answers
Which of these would have the highest temperature?
ice
water
water vapor
Answers
Answer:
Water vapor
Explanation:
Water Vapor has the highest temperature, due to its being in a gas state, and gases usually have very high temperatures, for example steam when you boil pasta.
Hope this helps you! Have a nice day!
What is the difference between visible light and x rays
Answers
Answer: X rays are high energy electromagnetic waves, but visible light is medium energy electromagnetic waves.
The visible spectrum is very narrow compared to the X-ray spectrum.
X rays can penetrate the human body but visible light is not capable of doing that. Hope this helped! :)
Pls Help Fast I will give Brainliest and Points:
To ensure that a vehicle crash is inelastic, vehicle safety designers add crumple zones to vehicles. A crumple zone is a part of a vehicle designed to crumple easily in a crash. Use Newton’s second law to explain why crumple zones reduce the force in a collision.
Answers
Answer:
Crumple Zones are parts of a car that are designed to deform and absorb large amounts of energy from car collisions and impacts. This helps reduce the force that acts on the driver in a car accident [1]. 2: Newton's Second Law states that Force= Mass x Acceleration
Explanation:
The number of waves that pass a given point in a second is___.
1- amplitude
2- wavelength
3- frequency
4- wave speed
Answers
Answer:
Frequency
Explanation:
The frequency ( ) of a wave is the number of waves passing a point in a certain time.
if the
D=19.3g/cm^3
v= 1.61 cm^3 what is the mass
Answers
Answer:
Mass=DV
=19.3g/cm^3 ×1.61cm^3
=31.266g
Explanation:
Mass is the product of an objects density and the space it occupies (volume)
which four items were invented for moving and working in space This is astrology but it didn't give me an option to put that as the subject.
Answers
Answer: Innovations originally designed for space vehicles, including artificial muscle systems, robotic sensors, diamond-joint coatings, and temper foam,
Explanation: make artificial human limbs more functional, durable, comfortable, and life-like.
Un bombero alejado d = 31.0 m de un edificio en llamas dirige un chorro de agua desde una manguera contra incendios a nivel del suelo con un ángulo de θi = 33.0° arriba de la horizontal como se muestra en la figura siguiente. Si la rapidez del chorro cuando sale de la manguera es vi = 40.0 m/s, ¿a qué altura (en m) golpeará el edificio? m
Answers
Answer:
El chorro golpea el edificio a una altura de 15.943 metros con respecto al suelo.
Explanation:
El chorro de agua exhibe un movimiento parabólico, dado que este tiene una inclinación inicial y la única aceleración es debida a la gravitación terrestre. Las ecuaciones cinemáticas que modelan el fenómeno son:
Distancia horizontal (en metros)
\(x = x_{o} + v_{o}\cdot t \cdot \cos \theta\)
Donde:
\(x_{o}\) - Posición horizontal inicial, medida en metros.
\(t\) - Tiempo, medido en segundos.
\(v_{o}\) - Velocidad inicial, medida en metros por segundo.
\(\theta\) - Angulo de inclinación del chorro de agua, medido en grados sexagesimales.
Distancia vertical (en metros)
\(y = y_{o} + v_{o}\cdot t \cdot \sin \theta + \frac{1}{2}\cdot g \cdot t^{2}\)
Donde:
\(y_{o}\) - Posición vertical inicial, medida en metros.
\(g\) - Constante gravitacional, medida en metros por segundo al cuadrado.
Partiendo de la primera ecuación, se despeja el tiempo:
\(t = \frac{x - x_{o}}{v_{o}\cdot \cos \theta}\)
Si \(x = 31\,m\), \(x_{o} = 0\,m\), \(v_{o} = 40\,\frac{m}{s}\) and \(\theta = 33^{\circ}\), entonces:
\(t = \frac{31\,m-0\,m}{\left(40\,\frac{m}{s} \right)\cdot \cos 33^{\circ}}\)
\(t = 0.924\,s\)
La altura máxima se calcula por sustitución directa de términos en la segunda ecuación. Si \(y_{o} = 0\,m\), \(v_{o} = 40\,\frac{m}{s}\), \(t = 0.924\,s\) y \(g = -9.807\,\frac{m}{s^{2}}\), entonces:
\(y = 0\,m + \left(40\,\frac{m}{s} \right)\cdot (0.924\,s)\cdot \sin 33^{\circ} + \frac{1}{2}\cdot \left(-9.807\,\frac{m}{s^{2}} \right) \cdot (0.924\,s)^{2}\)
\(y = 15.943\,m\)
El chorro golpea el edificio a una altura de 15.943 metros con respecto al suelo.
a diver plunges head first into a pool while traveling at 28 meters per second upon entering the water the diver stops within a distance of 4.0 m from the diving board consider the diver to be a single Point located at our Center of mass and assume acceleration through the water to be uniform
calculate the acceleration of the diver as she travels through the water
Answers
Answer:
98ms^2
Explanation:
v^2=v1^2+2ad
a^2=(28m/s)^2 +2×a×4.00m
-784=8a
a=98m/s^2
The acceleration of the diver as she travels through the water is - 98 m/s², negative sigh indicates that her speed is deceasing.
What is acceleration?Acceleration is rate of change of velocity with time. Due to having both direction and magnitude, it is a vector quantity. Si unit of acceleration is meter/second² (m/s²).
Given parameters:
Initial speed of the board: u = 28 meters per second.
Final speed of the board: v = 0 meters per second.
Distance travelled: s = 4.0 meter.
Let the acceleration of the diver is = a.
Now, from v² = u² + 2as, it can be written that:
0² = 28² + 2a×4
a = - 28²/(2×4)
= - 98 m/s²
Hence, acceleration of the diver as she travels through the water is - 98 m/s², negative sigh indicates that her speed is deceasing.
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if the real image for a 11.8 cm focal length concave mirror is located 26.7 cm from the mirror, determine the location of the object.
Answers
The object is located 315.06 cm away from the concave mirror.
We can use the mirror formula for concave mirrors: 1/f = 1/do + 1/di, where f is the focal length, do is the object distance, and di is the image distance.
Given:
f = -11.8 cm (concave mirror focal length is negative)
di = -26.7 cm (real image distance is negative)
Now, we will plug in the values and solve for do:
1/(-11.8) = 1/do + 1/(-26.7)
To find do, follow these steps:
1. Find the common denominator: 11.8 * 26.7 = 315.06
2. Rewrite the equation with the common denominator: -26.7/do + 11.8/do = -(11.8 * 26.7)/315.06
3. Simplify the left side of the equation: (-26.7 + 11.8)/do = -14.9/do
4. Cross-multiply to solve for do: -14.9 * 315.06 = -4,694.194
5. Divide both sides by -14.9: do = 4,694.194 / -14.9 = 315.06 cm
The object is located 315.06 cm away from the concave mirror.
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What is observed when a noble gas is heated and the emitted light shone through a prism?.
Answers
Given what we know, we can confirm that when a noble gas is heated and the emitted light is shone through a prism, we can observe the emission spectrum.
What is the emission spectrum?These can be described as lines of different colored lights. These lines will be the observed results after heating the gas and shining its light through a prism. This emission spectrum can provide important information regarding the chemical composition of its source.
Therefore, we can confirm that the emission spectrum, described as lines of varying colors, is what we observe when a noble gas is heated and the emitted light is shone through a prism.
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congugar verbos en primera persona del singular
Answers
Sounds cause immediate damage to the auditory system when their amplitude exceeds: Select one: a. 70 Hz. b. 140 dB. c. 70 dB. d. 140 Hz.
Answers
The correct answer to the question is b. 140 dB. When sounds exceed this amplitude, they can cause immediate damage to the auditory system, including the ear drums, hair cells in the cochlea, and nerves that transmit sound to the brain.
Prolonged exposure to high-amplitude sounds can lead to permanent hearing loss, tinnitus (ringing in the ears), and other auditory issues. It is important to protect your ears from loud noises by wearing earplugs or earmuffs in noisy environments, such as concerts, construction sites, and airports.
It is also important to limit exposure time to loud sounds and to take breaks in quiet environments to allow your ears to rest. If you experience any hearing loss or other auditory symptoms, it is important to see a healthcare professional for diagnosis and treatment. Overall, it is essential to protect your hearing to maintain a good quality of life.
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(Please help asap)
Choose the appropriate descriptor for the term gram per centimeter cubed .
mass
area
volume
density
Answers
Answer:
density is the correct answer
Explanation:
what two variables are multiplied together to calculate weight?
Answers
The two variables that are multiplied together to calculate weight are mass and acceleration due to gravity.
Which variables are multiplied to calculate weight?Weight is a measure of the force exerted on an object due to gravity. It is calculated by multiplying two variables: mass and acceleration due to gravity. Mass refers to the amount of matter contained in an object, while acceleration due to gravity represents the gravitational force acting on the object. The formula for calculating weight is weight = mass x acceleration due to gravity. The mass of an object determines its inertia and is usually measured in kilograms, while the acceleration due to gravity is a constant value that depends on the location and is approximately 9.8 meters per second squared on Earth. By multiplying these two variables, we can determine the force of gravity acting on an object, which we commonly refer to as its weight.
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I need help. It's 9th grade physical science
It takes a ball 2 minutes to roll back and forth on the ground from A to B to C. Using the diagram above, give the total distance traveled and the displacement of the ball.
What is the total distance traveled and the displacement of the ball?
Answers
Answer:
i think its c
Explanation:
Read the case study. In your own words and in complete sentences answer the questions. Case Study 1 While preparing dinner Jane knocked a pan of boiling water onto herself. She suffered partial thickness burns to the anterior region of her legs. 1. What is partial thickness burns? 2. Jane loose sensation of the affected area? Why? 3. Using the Rule of Nines calculate the total body surface area percentage that is burned?
Answers
Partial thickness burns are burns that involve the top layer of skin and the layer below it.
Jane lost sensation in the affected area because the nerve endings may be affected in partial-thickness burns.
As per the Rule of Nines, each leg makes up 18% of the body surface, so the anterior region of both legs would account for 18% of 50% (half of the body surface) which equals to 9% of the body surface.
Using the Rule of Nines, the total body surface area percentage that is burned is calculated. It is a quick and easy way to calculate the area of the burn that is used to determine the degree of burn.
The rule of nines is a medical term used to evaluate the extent of burns on a patient's body. This rule estimates the amount of body surface area (BSA) that has been affected by burns. This technique is often used by healthcare professionals to predict a patient's fluid needs and to help guide treatment decisions. The Rule of Nines divides the body into 11 sections, each accounting for 9% of the body surface. The remaining 1% is accounted for by the perineum. The areas are head and neck, arms, chest, abdomen, upper back, lower back, buttocks, front of legs, and back of legs. In this case, Jane had suffered partial thickness burns to the anterior region of her legs.
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a piano is a stringed instrument in which felt hammers are made to strike the strings by an arrangement of keys and levers.
Answers
Answer:
Analytical
Explanation:
What is the weight (w) of the water displaced by the aluminum test object?
Choose one : 4.9 N
9.8 N
49 N
98 N
Answers
Option 4.9 N is correct.
The weight (w) of the water displaced by the aluminum test object is 4.9 N.
How to calculate the weight of water displaced by an object? The weight of water displaced by an object can be calculated using Archimedes’ principle, which states that the weight of a liquid displaced by an object is equal to the buoyant force acting on the object. When an object is placed in a liquid, it experiences a buoyant force that is equal to the weight of the liquid displaced by the object.
Buoyant force = weight of displaced liquid Using the given options, we can calculate the weight of water displaced by the aluminum test object and match it with the answer. The mass of the aluminum object is 0.5 kg and its volume is 0.0001 m3. We know that the density of water is 1000 kg/m3 and the acceleration due to gravity is 9.8 m/s2.
Therefore, the weight of water displaced by the aluminum test object is given by: w = mg = ρVg = 1000 x 0.0001 x 9.8 = 0.98 N = 4.9 N (divided by 2 since only half the object is submerged)Therefore, the weight (w) of the water displaced by the aluminum test object is 4.9 N.
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When the defibrillator is in use, a potential difference of 4800 V is applied across the
person's chest.
A charge of 0.16 coulombs passes through the person's chest in 4.0 ms
Calculate the resistance of the person's chest.
Answers
If a defibrillator is in use with the given potential difference and charge in the given time, the resistance of the person's chest is 120 Ohms.
What is the resistance of the person's chest?From Ohm’s law;
V = I × R
Where V is the voltage or potential difference, potential difference, I is the current and R is the resistance.
Given that;
Potential difference v = 4800VCharge Q = 0.16CTime elapsed t = 4.0ms = ( 4/1000 )s = 0.004sResistance R = ?First, we calculate the current I.
Since current is the electric charge transferred per unit time.
I = Q/t
I = 0.16C / 0.004s
I = 40A
Now, the resistance of the person's chest will be;
V = I × R
R = V / I
R = 4800V / 40A
R = 120Ω
Therefore, If a defibrillator is in use with the given potential difference and charge in the given time, the resistance of the person's chest is 120 Ohms.
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A dishwasher has a power rating of 1200 W. Work out how long it would take to transfer 480 kJ of energy.
Answers
The dishwasher would need to transfer 480 kJ of energy for 400 seconds, or 6 minutes and 40 seconds.
How are power and force related?Power is determined by the product of force, velocity, and distance traveled (in the force's direction). For those looking to enter the teaching profession in the state of Uttar Pradesh, this is a fantastic opportunity. Voltage and current together produce electrical power P=VXI.
time = energy / power
480 kJ = 480,000 J
time = energy / power
time = 480,000 J / 1200 W
time = 400 seconds
Hence, for the dishwasher to transfer 480 kJ of energy, it would take 400 seconds, or 6 minutes, 40 seconds.
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