44. ( Calculate the magnitude of the change in momentum in
each of the following examples.
a. A 1,200 kg car accelerates from rest to a speed of
20 m/s.
b. A 75 g pellet moving at 18.0 m/s hits a tree and
lodges in it.
c. A 250 g rubber ball hits the floor at 10.0 m/s and
rebounds at 6.0 m/s.
d. A 60 kg student jogging at 3.0 m/s speeds up to
6.5 m/s.
