A6.0-kg block slides from point a down a frictionless curve to point b. after the block passes point b, a friction force opposes the motion of the block so that it comes to a stop 2.5 m from b. calculate the coefficient of kinetic friction between the block and the surface after position b.

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.