A spring stretches by 15cm when a mass of 300g hangs down from it if the spring is then stretched an additional 10 CM and released calculate the spring constant, the angular velocity, the amplitude of oscillation, the maximum acceleration of the mass, the period and frequency

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.