9th Sep '25

Newton's Laws of Motion

Law1:

All bodies will continue to be stationary or to move with uniform velocity unless they are acted on by a resultant force.

Law2:

The rate of change of [velocity]* of a body is directly proportional to the applied resultant force, and occurs in the direction of the resultant force.

*should read momentum but this is equivalent to velocity if the mass is constant.

Law3:

If body A exerts force on body B, then body B exerts an equal force in the opposite direction on body A.

A translation

Law1:

An object will remain as it is, until an overall force acts on it.

Law2:

The bigger the force the bigger the acceleration, in the direction of the force.

Law3:

To every action there is an equal and opposite reaction. If an object is sitting still on a table, for example, then the forces must be balanced (from Law1). Since we know the object has a weight due to gravity, the table must provide a force to balance it, in an upward direction.

Move - Newtons Laws