Question

Two metal balls with the same mass hang so that they are touching each other. The ball on the left is pulled to the side and released. What will happen when it swings back and hits the ball on the right?



(1 point)
Responses

The ball on the left will stop, and the ball on the right will remain still.
The ball on the left will stop, and the ball on the right will remain still.

The ball on the right will swing to the right
The ball on the right will swing to the right

Both balls will swing to the right.
Both balls will swing to the right.

Both balls will swing to the left.

Answer 1

The ball on the right will swing to the right.

Reason: for equal masses in an (approximately) elastic collision the moving ball stops and transfers its velocity to the other ball (conservation of momentum and kinetic energy).