What occurs when a ball falls from a balcony? a. the earth moves toward the ball. b. neither the ball nor the earth actually move. c. the earth moves away from the ball. d. the ball moves but not the earth

A0.580-kg rock is tied to the end of a string and is swung in a circle with a radius of 0.500 meters. the velocity of the rock is 4.50 m/s. what is the centripetal force acting on the rock? 15.5 n 5.22 n 69.8 n 23.5 n

Suppose a comet has an orbital period of 309.1 years around the sun. what is it’s average distance from the sun?

Ahot-air balloon is 11.0 m above the ground and rising at a speed of 7.00 m/s. a ball is thrown horizontally from the balloon basket at a speed of 9.00 m/s. ignore friction and air resistance and find the speed of the ball when it strikes the ground.