A 0.5 kg ball doesn't spin and moves with horizontal velocity 8.0 m/s and is aimed at a rod with mass 2.0 kg and length 0.30 m that is fixed at its bottom point. When the ball hits the rod, 0.25 m above the ground, it bounces back with velocity 2.0 m/s.
a. What is the angular momentum (magnitude and direction) with respect to the pivot point of the rod of the ball-rod system immediate before the collision?
b. What is the ball's angular momentum (magnitude and direction) with respect to the pivot point of the rod immediately after the collision? the rod's angular momentum immediately after the collision? Your answer may include Δ, the final angular velocity of the rod.
c. What is the angular velocity of the rod immediately after the collision?