3. A golf ball of mass 0.045 kg traveling horizontally at 28 m/s hits a brick wall and bounces back at the same speed after a contact time of 0.040 s. Show that the average force of impact with the wall is 63 N.

Two horses begin at rest. after a few seconds, horse a is traveling with a velocity of 10 m/s west, while horse b is traveling with a velocity of 13 m/s west. which horse had a greater acceleration? a. horse a because its change in velocity was greater than horse b's in the same time. b. horse b because its change in velocity was greater than horse a's in the same time. c. horse b because its change in velocity was the same as horse a's, but it took less time. d. both horses had the same acceleration.