Two curling stones collide. Each has the same mass of 19 kg. Assume the ice is uniform and ignore the effects of spin (i.e. it doesn't "curl"). Initially, stone 1 is moving at 5 m/s, while stone 2 is at rest. After the collision, stone 1 moves off at 40° from its original path.
a. If the final speed of stone 1 is 3 m/s, then what is the final velocity (in magnitude and angle) of stone 2.
b. Again, if the final speed of stone 1 is 3 m/s, then show that this collision is not elastic.
c. If the collision is elastic, then what is the final velocity (in magnitude and angle) of each stone?