Two ice skaters push off against one another starting from a stationary position. The 45.0-kg skater acquires a speed of 0.375 m/s. What speed does the 60.0-kg skater acquire? Assume that any other unbalanced forces during the collision are negligible. O 0.375 m/s O 0.281 m/s O 0.750 m/s O 0.000 m/s O 0.500 m/s

A 1500-kg car traveling at 90 m/s toward the east suddenly collides with a 3000-kg car traveling at 60 m/s toward the south. The two cars stick together after the collision. What is the direction of motion of the cars after collision? O 53.1° S of E 68.7° S of E ) 45.0° S of E O 36.9° S of E

A 57.0-g tennis ball is traveling straight at a player at 19.0 m/s. The player volleys the ball straight back at 22.0 m/s. If the ball remains in contact with the racket for 0.060 0 s, what average force acts on the ball? 18.05 N 20.9 N 38.95 N 2.85 N O 57 N

As part of a carnival game, a ?b=0.528 kgmb=0.528 kg ball is thrown at a stack of 22.8 cm22.8 cm tall, ?o=0.403 kgmo=0.403 kg objects and hits with a perfectly horizontal velocity of ?b,i=11.1 m/s.vb,i=11.1 m/s. Suppose that the ball strikes the topmost object. Immediately after the collision, the ball has a horizontal velocity of ?b,f=3.10 m/svb,f=3.10 m/s in the same direction, the topmost object has an angular velocity of ?o=4.03 rad/sωo=4.03 rad/s about its center of mass, and all the remaining objects are undisturbed. Assume that the ball is not rotating and that the effect of the torque due to gravity during the collision is negligible. If the object's center of mass is located ?=16.0 cmr=16.0 cm below the point where the ball hits, what is the moment of inertia ?oIo of the object about its center of mass?   ?o=Io=   kg⋅m2kg⋅m2 What is the center of mass velocity ?o,cmvo,cm of the tall object immediately after it is struck?