Ball A leaves the edge of a level table with speed vAi and falls to the floor. A

Question

Ball A leaves the edge of a level table with speed vAi and falls to the floor. At the instant ball A leaves the table edge, another identical ball B, is released from rest at the height of the table top and also falls to the floor. It is observed that the balls reach the floor at the same time. 0Bi Consider the balls just before they reach the floor. a) Is the magnitude of the momentum of ball B greater than, less than, or equal to the magnitude of the momentum of ball A? Explain your reasoning. b) Is the kinetic energy of ball B greater than, less than, or equal to the kinetic energy of ball A? Explain your reasoning.

Explanation / Answer

A) Less than

It is because ball A has both vertical and horizontal component of velocity.

B) Less than.

Since B has less momentum and has same mass, it will have less KE

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