A 1 kg pool ball moving at + 10 m/s strikes a 2 kg pool ball which is initially

Question

A 1 kg pool ball moving at + 10 m/s strikes a 2 kg pool ball which is initially at rest. Which if the following statements are true immediately after the elastic collision? Answer
The 2 kg ball must have a negative velocity.
The two pool balls stick together.
The total kinetic energy of the two pool balls must be equal to 100 J.
The 2 kg ball's speed must be less than 10 m/s.
The 1 kg pool ball is at rest. A 1 kg pool ball moving at + 10 m/s strikes a 2 kg pool ball which is initially at rest. Which if the following statements are true immediately after the elastic collision? A 1 kg pool ball moving at + 10 m/s strikes a 2 kg pool ball which is initially at rest. Which if the following statements are true immediately after the elastic collision? The 2 kg ball must have a negative velocity. The two pool balls stick together. The total kinetic energy of the two pool balls must be equal to 100 J. The 2 kg ball's speed must be less than 10 m/s. The 1 kg pool ball is at rest.
The 2 kg ball must have a negative velocity.
The two pool balls stick together.
The total kinetic energy of the two pool balls must be equal to 100 J.
The 2 kg ball's speed must be less than 10 m/s.
The 1 kg pool ball is at rest.

Explanation / Answer

The 2 kg ball's speed must be less than 10 m/s.

The 2 kg ball's speed must be less than 10 m/s.

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