- An object will remain in a state of rest or in uniform motion in a straight line unless acted on by an external net force.
- The acceleration of a body, acted upon by an external net force, is directly proportional to the force being applied and inversely proportional to the body's mass.
- Force = Mass x Acceleration
For A Level maths and physics the following may also be useful:
The rate of change of momentum of a body is equal to the external net force being acted upon it, acting in the direction of the applied force"
- If body A exerts a force on body B, body B will simultaneously exert a force of equal magnitude, but opposite direction, on body A