Two identical billiard balls traveling at the same speed have a head-on collision and rebound. If the balls had twice the mass, but maintained the same size and speed, how would the rebound be different?

You are lying in bed and want to shut your bedroom door. You have a bouncy ball and a blob of clay, both with the same mass. Which one would be more effective to throw at your door to close it?

A 12kg hammer strikes a nail at a velocity of 7.5m/s and comes to rest in a time interval of 8.0ms What is the average force acting on the nail?

A 0.145kg baseball pitched horizontally at 27m/s strikes a bat and pops straight up to a height of 31.5m. If the contact time between the bat and ball is 2.5ms, calculate the average force between the ball and bat during contact.

A 950kg sports car collides into the rear end of 2200kg SUV stopped at a red light. The bumper lock, the brakes lock, and the two cars skid forward 3.0m before coming to a stop. The police officer, knowing the coefficient of kinetic friction between the tires and the road is about 0.8. He calculates the speed of the sports car at impact. What was that speed?

A car strikes a car at rest from behind. The bumpers lock and they move forward together. If their new final velocity is equal to , what was the initial speed of the first car?

Two bumper cars at an amusement park collide elastically as one approaches the other directly from the rear. The car in front (CarA) has a mass of 550kg and the car behind it (CarB) has a mass of 450kg. The car in front was traveling at 3.70m/s while the car behind hit him with a velocity of 4.50m/s. What are their final velocities after the collision?

A car with mass and initial velocity strikes a car of mass , which is at rest. If the two cars stick together after the collision, what is the final velocity?

A ball is thrown west at and collides with a ball while in the air. If the balls stick together in the crash and fall straight down to the ground, what was the velocity of the second ball?

A car travelling at rear ends another car at rest. The two bumpers lock and the cars move forward together. What is their final velocity?