1 a 0420 kg ice puck moving east with a speed of 312 ms has, Ask an Expert

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1) A 0.420 kg ice puck, moving east with a speed of 3.12 m/s, has a head-on collision with a 0.890 kg puck initially at rest. Assuming a perfectly elastic collision, what is the speed of the lighter puck? Use east as the positive axis.

What is the speed of the heavier puck?

2) A ball with a mass of 0.65 kg is dropped on a table. The initial height of the ball is 0.85 meters. After the ball hits the table it rebounds to a height of 0.67 meters. The time that the ball is in contact with the table is 0.017 seconds. Note that this is not a purely elastic or inelastic collision.

Calculate the change in the momentum of the ball during its collision with the table.

Calculate the average force acting on the ball during its collision with the table.

Calculate the change in kinetic energy of the ball during its collision with the table.

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