energy

the ability to do work

motion

a change in position

kinetic energy

energy of motion

potential energy

stored energy

generator

a device used to convert mechanical energy to electrical energy

Law of Conservation of Energy

energy cannot be created or destroyed

elapsed time

the length of time that passes from one event to another

speed

the rate at which the position of an object changes

distance

the length of a path between two points

force

a push or a pull

velocity

the speed and direction in which an object is moving

acceleration

the rate of change of velocity

friction

a force that opposes motion and that occurs when things slide or roll over eachother

inertia

the tendency of an object to resist changes in motion

Newton's 1st Law of Motion

n object at rest remains at rest, and an object in motion remains in motion at constant speed and in a straight line unless acted on by an unbalanced force

Newton's 2nd Law of Motion

the acceleration of an object depends on the mass of the object and the amount of force applied

Newton's 3rd Law of Motion

for every action there is an equal and opposite reaction

gravity

the force of attraction between any two objects that have mass

Law of Universal Gravitation

gravitational force depends on the mass of the two objects involved and on the distance between them