# Newton's Laws

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## Newton's Laws

#### Newton's first law of motion

"Bodies will continue to move with a uniform velocity (which includes being stationary) unless acted on by a resultant force."

This means that if a body changes speed or direction a resultant force must be acting on it.

#### Newton's second law of motion

"Resultant force is equal to the rate of change of momentum."

This forms the basis of Newton's equation, F=ma. This equation actually comes from the idea of momentum, which can be found in the Principles of the conservation of momentum Learn-it.

The direction of the acceleration is always in the same direction as the unbalanced force.

#### Newton's third law of motion

"Every force has an equal and opposite force acting on another object."

This can all sound difficult to understand, but let's look at the laws in a simple example.

Putting all three laws together:

Question:.