1. You are lying in bed and want to shut your bedroom door. You have a bouncy ball and a blob of clay, both with the same mass. Which one would be more effective to throw at your door to close it?
(a) The super ball.
(b) The blob of clay.
(c) Both the same.
(d) Neither will work.
2. A baseball is pitched horizontally toward home plate with a velocity of 110 km h. In which of the following scenarios does the change in momentum of the baseball have the largest magnitude?
(a) The catcher catches the ball.
(b) The ball is popped straight up at a speed of 110 km h.
(c) The baseball is hit straight back to the pitcher at a speed of 110 km h.
(d) Scenarios (a) and (b) have the same change in momentum.
(e) Scenarios (a), (b), and (c) have the same change in momentum.