Suppose a rock is dropped off a cliff with an initial speed of 0 m/s. what is the rock's speed after 5 seconds, in m/s, if it encounters no air resistance

An object resting on a table weighs 100 n. with what force is the object pushing on the table? with what force is the table pushing on the object? explain how you got your answer.

What are the north and south poles of a solenoid change with?

A14 kg rock starting from rest free falls through a distance of 5.0 m with no air resistance. find the momentum change of the rock caused by its fall and the resulting change in the magnitude of earths velocity. earth mass is 6.0 * 10^24 kg. show your work assuming the rock earth system is closed.