A small putty ball of mass m = 1.2 kg moving at v = 3 m/s strikes the end of a bar of mass M = 20 kg and length L = 0.7 m. The ball sticks to the bar. The bar is attached to a frictionless pivot and is initially at rest and hanging vertically. What is the angular velocity Ćā° immediately after the collision? Note: The moment of inertia of a rod spinning about its end is I = ML^2/3.
0.92 s^-1
0.65 s^-1
0.51 s^-1
0.27 s^-1
1.17 s^-1
B) What quantities are conserved in the collision between the ball and the rod?
linear momentum
angular momentum
linear momentum and angular momentum
None of these.