What must be true about an object's acceleration as it is traveling in the positive direction and slowing down?
a. the object has no acceleration
b. it negative acceleration is constant
c. its acceleration is the same as its velocity
d. the object is accelerating in the negative direction

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.