A rat of mass 0.25 kg runs at a speed of 1.25 m/s. What is the momentum of
the rat?

A500g object falls off a cliff and losers 100 j from its gravitational potential energy store. if the gravitational field strength g=9.8n/kg, how high is the cliff?

To do work, this truck uses energy stored in chemical fuel and an electrical battery. how much total energy does this truck put out?

Imagine that someone pushes one marble toward a motionless marble. would there still be action-reaction forces involved in the collision? how might the marbles’ motions be changed? ?