You throw a tennis ball against a brick wall. The ball rebounds with a speed equal to the original speed, but it is now moving in the opposite direction. Note that the brick wall is rigid enough that it does not deform at any time. Answer the following questions:

Which is true about the momentum of the tennis ball?

There is not enough information to tell.
It IS conserved.
It is NOT conserved.

Which is true about the momentum of the brick wall?

There is not enough information to tell.
It IS conserved.
It is NOT conserved.

Assuming that the wall only interacts with the ground and the ball, which is true about the magnitude of the impulse from the ground on the wall?

There is not enough information to tell.
It is negligible compared to the magnitude of the impulse from the wall on the ball.
It is greater than the magnitude of the impulse from the wall on the ball.
It equals the magnitude of the impulse from the wall on the tennis ball.
It is less than the magnitude of the impulse from the wall on the ball.