A 2.4kg block sliding on a rough horizontal surface is attached to one end of a horizontal spring ( k=188/m) which has its other end fixed. The block passes through the equilibrium position with a speed of 2.76m/s and first comes to rest at a displacement of 0.23m from equilibrium. What is the coefficient of kinetic friction between the block and the horizontal surface?

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.