When the value of one variable increases, the other decreases

distance traveled divided by the time elapsed

speed of an object is constantly changing

increase in the rate or speed of something

move under the force of gravity only; fall rapidly

Push or pull

force exerted on or against an object by something in contact with it

resistance to change in some other physical property

the force exerted on the mass of a body by a gravitational field

resistance that one surface or object encounters when moving over another

forces that are in opposition to the relative motion of an object as it passes through the air

being stretched tight

force causing the movement

rate at which work is done

quantity of motion of a moving body, measured as a product of its mass and velocity

force acting briefly on a body and producing a finite change of momentum

ability to do work

stored energy

energy in motion