A projectile of mass m = 8.00 grams is fired horizontally at 135 m/s at a stationary target with mass M = 950 grams hanging vertically from a rigid, massless rod of length 25.0 cm.The projectile goes completely through the target and emerges with a horizontal speed of 75.0 m/s.

(a) Find the speed of the target when the projectile first exits the target.

(b)Find the maximum angle the rod makes with the vertical. 

(c) If the projectile took 2.00 milliseconds pass through the target, what was the magnitude of the average contact force between the projectile and the target?