P.S. ch12 Forces

Front

Force

Back

A push or a pull exerted on an object in order to change the motion of the object; A vector!

Front

Force is measured in

Back

N (newtons)

Front

Force is represented by

Back

an arrow

Front

Net force

Back

The combination of all forces acting on an object

Front

Forces moving in the same direction are

Back

added together

Front

Forces moving in opposite directions are

Back

subtracted

Front

Balanced forces have

Back

a net force of zero - object does not move

Front

Unbalanced forces

Back

do not equal 0 - causes a change in the motion of an object

Front

Friction

Back

A force that opposes motion between two surfaces that are in contact

Front

Static friction

Back

Friction that acts on objects that are not moving