A

applied force

a force applied to something

attract

to pull towards each other

F

force

a push or pull

friction

a force of rubbing objects

frictional force

the force caused by friction

G

gravity

the force that pulls all things towards the center of the earth

I

inertia

a property of all objects that is related to its mass - moving objects tend to stay moving and motionless objects remain motionless

M

magnetic force

the force created by a magnet

mass

The amount of matter in an object

motion

the changing of location or position

N

Newton

an English philosopher and mathematician who originated the theory of gravity

normal force

the force of an object which supports another object such as a book laying on a table

R

resisting force

a force such as wind resistance or friction

S

spring force

force created by a spring

T

tension force

the force of tension in a wire, rope or cable

V

velocity

speed in one direction