1) 4 m/s A cart starting from rest rolls down a hill and at the bottom has a speed of 4 m/s. If the cart were given an initial push, so its 2) 5 m/s 3) 6 m/s initial speed at the top of the hill was 3 m/s, what would be its speed at the bottom? 4) 7 m/s 5) 25 m/s

Q: If a 0.50 kg ball is moving at a speed of 12 m/s what is the kinetic energy of the ball? Equation is…

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Q: The figure below shows to balls, analyse and evaluate the information given, to determine which of…

A: Given that: m1=900 g=0.9 kgm2=0.4 kgh1=300 cm=3 mh2=7 mg=9.8 m/s2

Q: A skateboarder with a mass of 90 kg is skating towards a ramp at 5 m/s. The skater begins to move up…

A: a) Lets apply energy conservation to solve this question:- Ei= Ef => Ki + Ui = Kf + Uf => 0.5…

Q: A 3 kg pendulum bob on a string 5 m long is released with a velocity of 3 m/s when the support…

A: Given data: Mass (m) = 3 kg Length (L) = 5 m Initial velocity (u) = 3 m/s Angle (θ) = 25°, with the…

Q: 4. Spheres A and B are dropped at the same time from a clff. Sphere B is dropped from twice the…

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Q: 7.) A 4kg mass is spun around in a horizontal circle on a table using a 0.3-m-long piece of string.…

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Q: Which of the following bodies has the largest kinetic energy? Select one: a. Mass 2M and speed 3V b.…

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Q: If all the items in the figure have the same mass,which two items will have the same gravitational…

A: Let mass of each object A, B, C, and D = m  The acceleration due to gravity = g ( for each object).…

Q: An asteroid starts at rest infinitely far from Earth. The asteroid has a mass of 1.00×10ª kg.…

A: The work done by the Moon's gravitational field can be evaluated through the change in potential…

Q: 14) When an object is solely under the influence of gravitational force, the sum of its kinetic and…

A: The statement is (A) TRUE.

Q: A 150kg roller coaster car rolls frictionlessly down a 30m tall hill. If the car was initially at…

A: Mass (m) = 150kg  Height (h) = 30m

Q: 3-)Find the displacement, velocity, kinetic energy, potential energy and momentum of an object,…

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Q: km Calculate the kinetic energy of a 4.2 × 10° kg satellite moving at a speed of 6.0 - Round your…

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Q: Ah = ? Ax = 20m

A: Given that:m=250 kguA=10 m/suB=15 m/s

Q: kinetic energy

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Q: When the speed of a car is doubled, the car's

A: When speed of car is double i e        v' = 2v . And we know  Momentum = mv  Interia depends on…

Q: An object changes speed such that its kinetic energy doubles. If its original speed was v, what is…

A: Given data:  New kinetic energy (KE') = 2KE The original speed = v Required: New speed (v')

Q: Your friend throws a stone that has a mass of 4kg straight down from the top of a 175m tall building…

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Q: A student stands at the top of a building of height 50 m. He throws two identical balls with a speed…

A: These is a problem of kinematics under gravity. The ball thrown downward has initial speed of 20…

Q: Which one of the following situations is an example of an object with a non-zero kinetic energy? a…

A: Required : An example of an object with a non zero kinetic energy.

Q: A crate of mass 10 kg starts from rest at the top of a 7 - m-long ramp inclined at 45 deg. The ramp…

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Q: Using the picture of the roller coaster, calculate the KE when the coaster is HALF the distance DOWN…

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Q: If you triple the velocity of an object, by how much does this change the object's kinetic energy?

A: Let the initial velocity of object = vLet the mass of object = m

Static and Kinetic Friction

Kinetic friction comes into existence when there are moving surfaces means in other words we can say that the force which comes into existing between moving surfaces is known as kinetic friction.