Collision Problems Due 2/2, 2/3

Two objects stick together and move with a common velocity after colliding. Identify the type of collision.

• elastic

• perfectly elastic

• inelastic

• perfectly inelastic

Two billiard balls collide. Identify the type of collision.

• elastic

• perfectly elastic

• inelastic

• perfectly inelastic

Two swimmers relax close together on air mattresses in a pool. One swimmer's mass is 48 kg, and the other's mass is 55 kg. If the swimmers push away from each other,

• their total momentum triples

• their momenta are equal but opposite

• their total momentum doubles

• their total momentum decreases

Two balls of dough collide and stick together. Identify the types of collision.

• elastic

• perfectly elastic

• inelastic

• perfectly inelastic

What is the TOTAL MOMENTUM for the system BEFORE COLLISION?

• 14 Kg x m/s

• 10 Kg x m/s

• 24 Kg x m/s

• -24 Kg x m/s

What will the TOTAL MOMENTUM be AFTER COLLISION?

• 12 Kg x m/s

• 10 Kg x m/s

• 24 Kg x m/s

• -24 Kg x m/s

If the cars collided INELASTICALLY, how would they move afterward (if at all)?

• They would BOUNCE OFF and move LEFT

• They would BOUNCE OFF and move RIGHT

• They would STICK TOGETHER and move LEFT

• They would STICK TOGETHER and move RIGHT

A 9300 kg railroad car traveling at a velocity of 5 m/s strikes a second boxcar that weighs 5000 kg at rest. If all the momentum is transferred, at what speed will the second boxcar move?

• 18.6 m/s

• 9.3 m/s

• 7.5 m/s

• 1.86 m/s

A diver of mass 65 kg is initially at rest holding a speargun. He shoots a 2 kg spear from the gun with a speed of 15 m/s at a fish, but misses. How fast does the diver move backwards immediately after the spear is shot?

• 30 m/s backwards

• .38 m/s backwards

• .46 m/s backwards

• 47.5 m/s backwards

A 75 kg hockey goalie (initially at rest) catches and holds a 0.105 kg puck that was moving at him 24 m/s. With what speed does the goalie slide on the ice after the catch?

• 0.034 m/s

• 23.97 m/s

• 74.63 m/s

• 1.30 m/s