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

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.

Both balls will swing to the left.
Both balls will swing to the left.

Both balls will swing to the right.

Answer 1

The ball on the right will swing to the right.

Because the collision is (approximately) elastic and the masses are equal, momentum and kinetic energy transfer so the moving left ball stops and the right ball takes its velocity and swings out.