Q. A 80 g, 33-{rm cm}-long rod hangs vertically on a frictionless, horizontal axle passing through its center. A 11 g ball of clay traveling horizontally at 2.5 m/s hits and sticks to the very bottom tip of the rod.
To what maximum angle, measured from vertical, does the rod (with the attached ball of clay) rotate?
Q. A 2.69 kg steel ball strikes a massive wall at 11.4 m/s at an angle of α=65.8° with the plane of the wall. It bounces off with the same speed and angle (as seen in the figure below).
If the ball is in contact with the wall for 0.180 s, what is the average force exerted on the ball by the wall?