If you push a box a distance of 2000 meters with a force of 1 newton, how many calories have you used

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.

The change from a liquid to a gas or solid to a liquid is an example of a change of.. a.) chemical b.) physical c.) atomic d.) nuclear e.) phase

An astronaut throws a rock. the rock travels through outer space at a constant velocity. which statement applies to the motion of this rock? a- an unbalanced force is acting on the rock, causing it to accelerate. b-the rock will undergo constant acceleration until a force acts on it. c- the rock will continue on its current path until an unbalanced force acts on it. d- the force that makes the rock move through space is equal to its mass divided by its velocity