A ball with momentum p strikes a wall and bounces off at the same speed. The change in the ball’s momentum is:

A 1640 kg merry-go-round with a radius of 7.50 m accelerates from rest to a rate of 1.00 revolution per 8.00 s. Estimate the merry-go-round as a solid cylinder and determine the net work needed for this acceleration.

A wheel rolling on a horizontal surface with an angular speed of 2.5 rad/s gets on a ramp and rolls down the ramp with a constant angular acceleration of 2.0 rad/s2. If it takes 11.5 s to reach the bottom of the ramp, what is the final angular speed of the wheel at the bottom?

The escape velocity at the surface of Earth is 8 km/s. What is the escape velocity at the surface of a planet whose radius is 4 times and whose mass is 100 times that of Earth?

A horizontal force of 5 N accelerates a 4-kg object from rest at 0.5 m/s2. What friction force acts on the object?

Work done by STATIC FRICTION is always:

A 2-kg softball is pitched to a player at 20 m/s. The player hits it back along the same path and at the same speed. If the bat was in contact with the ball for 0.1 s, the average force on the ball was:

An object that is acted upon by a net force of 20 N is moving with an acceleration of 10 m/s2. What is the mass of the object?

A 1300 kg sports car can accelerate from 0 to 27 m/s in 5.2 seconds. How much power from the engine is directly going into accelerating the car?

In an inelastic collision, the final total momentum is _____