For an isolated system, which totals remain unchanged in a perfectly elastic collision?

Use the table. How should this collision be classified?

A dart embeds in a board and stops. What happens to the kinetic energy it had before impact?

Why can two carts exchange momentum without changing their combined momentum when external forces are negligible?

A 1 kg cart moving at 3 m/s hits an identical stationary cart in a perfectly elastic, head-on collision. The first cart stops. What is the second cart's speed?

A toy car moving at 4 m/s hits an identical stationary toy car, and they stick together. If external impulse is negligible, what is their common speed?

The carts in the table stick together on a track with negligible external impulse. Positive velocity means rightward. What is their common signed velocity?

The energy bars describe a perfectly elastic collision. What value belongs in the empty slot?

Use the energy bars. How much energy was transferred out of the carts' motion during impact?

A toy car rolls right into a spring fixed to a wall. While the car compresses the spring, what is the direction of the spring force on the car?

As a toy car compresses an ideal spring, which energy store increases?

A toy car rebounds from an ideal spring on a rough ramp but fails to reach its starting height. What explains this result?

For a system consisting of a bouncing ball alone, which force is external and changes its momentum during impact with the floor?

A 0.6 kg ball and a 0.003 kg ball exert equal-magnitude impulses on each other. Which comparison is correct?

Before performing the stacked-ball drop, what should everyone nearby wear to protect against an unpredictable rebound?

Two carts rebound after contact. What measurement would determine whether the event was perfectly elastic?

An isolated collision simulation shows a small mismatch in calculated total momentum. Which possible source of the mismatch should a learner investigate?

In an ideal Newton's cradle, a released end bob hits the resting row. Which observation is expected?

For the same change in passenger momentum, why does a car's crumple zone reduce the average force during a crash?

Equal-mass clay balls have the velocities shown and stick together. With negligible external impulse, what is their velocity just after impact?