1. There are two pucks and they are on a frictionless air hockey table. Puck M has a mass of 410 g and an initial velocity of 3.5 m/s in the +x direction. Puck J has a mass of 600 g and is initially at rest. After the collision, puck M has been veered off by 30 degrees and has a final speed of 2.6 m/s.

a. What is puck J's speed after the collision?

b. What is puck J's direction after the collision?

2. A force of F is applied to a rod in several different ways. The rods in each case are the same and are pivoted about the same point, P. Define counterclockwise as positive and assume ?30.

a. In which case is the torque about the pivot P due to this force the smallest?

b. In which case is the torque about the pivot P due to this force the greatest?

c. Rank the torques about the pivot point P for each from lowest to highest. Explain why you ranked them in this way (or show work).

A C F F P P D P F F P P P