A physics student whirls a rubber stopper around in a horizontal circle. Suddenly the string breaks. What is the speed of the rubber stopper the moment the string breaks if the radius of the circle is 0.75 m, the mass of the stopper is 45 grams, the angle θ in the diagram is 30 degrees, and the counter weight is 100 grams? Use g = 10 m/s^2.

In addition to gravity, what is the other predominant force that affects the motion of a pendulum?

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.

Aplayer uses a hockey stick to push a puck at a constant velocity across the ice. the weight of the puck is 170 n. the coefficient of friction is 0.0600. with what force must the player push the puck so that his force just equals the frictional force? 28.3 n 0.999 n 0.102 n 0.0104 n