Which statement best describes inertia? a) a piece of paper will fall toward earth at a faster rate than a baseball will b) if earth had no atmosphere, a baseball would fall toward earth at a faster rate than a piece of paper would. c) more force is needed to stop a moving car than to stop a train moving at the same speed. d) more force is needed to stop a moving train then to stop a car moving at the same speed.

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?

If there's a small amount of friction between two surfaces, the result could be select all that applya. no movement b. heatc. a little bit of movementd. sliding around

Anonzero net force acts on a particle and does work. which one of the following statements is true? the kinetic energy of the particle changes, but the speed of the particle does not change. the kinetic energy of the particle does not change, but the speed of the particle does change. the kinetic energy of the particle changes, but the velocity of the particle does not change. the kinetic energy and the speed of the particle change, but the velocity of the particle does not change. the kinetic energy, speed, and velocity of the particle change.