A.

1. A cardinal (Richmondena cardinalis) of mass 4.0010² kg and a baseball of mass 0.142 kg have the same kinetic energy. What is the ratio of the cardinal's magnitude p_c of momentum to the magnitude p_b of the baseball's momentum?

2. A man weighing 650 N and a woman weighing 500 N have the same momentum. What is the ratio of the man's kinetic energy K_m to that of the woman K_w?

B.

A baseball has a mass of 0.145 kg

1. if the velocity of a pitched ball has a magnitude of 46.0 m/s and the batted ball's velocity is 54.0 m/s in the opposite direction, find the magnitude of the change in momentum of the ball and of the impulse applied to it by the bat

P=

2. If the ball remains in contact with the bat for 1.90 ms, find the magnitude of the average force applied by the bat. Express your answer with the appropriate units

F=

C.

On a frictionless horizontal air table, puck A (with mass 0.254 kg ) is moving toward puck B (with mass 0.369 kg ), which is initially at rest. After the collision, puck A has velocity 0.116 m/s to the left, and puck B has velocity 0.648 m/s to the right.

1. What was the speed v_Ai of puck A before the collision?

2. Calculate K, the change in the total kinetic energy of the system that occurs during the collision