A 1100 kg car is traveling east at 14 m/s while a 1700 kg car is traveling west at 18 m/s, on the same one lane road and they collide headon. If the collision is perfectly elastic and takes 0.07 seconds what is the force of impact

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.