Forces

Formula

Force = Acceleration x Mass

Force

Vector - size + direction

Unbalanced Forces

Body will speed up / down or change direction

Measurement

Newtons (N)

Newtons first law

A body stays at rest or moves in a straight line with constant velocity unless an unbalanced force causes it to behave differently

Newtons second law

For a given body , the bigger the unbalanced force , the greater the acceleration

Balanced forces

No affect on movement

Formula for weight

Weight = Mass x Gravity

Free Fall

In the absence of air resistance all bodys fall at 10m/s . If there is no air resistance the speed of a falling object will increase at 10m/s

Terminal Velocity

The force stays the same while air resistance increases , these will eventually become equal and the body will stay at a constant speed