# OCR Physics A - Newtonian world word definitions

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Newton's First Law
A body will remain at rest or continue to move with constant velocity unless acted on by an external force
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Newton's Second Law
Force is proportional to the rate of change of momentum
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Newton's Third Law
When one body exerts a force on another the other body exerts a force that is equal in magnitude and opposite in direction on the first body
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Newton
The force which gives a mass of 1 kg an acceleration of 1 ms^-2
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Linear momentum
The product of mass and velocity ; momentum is a vector
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net force on a body
proportional to the rate of change of momentum
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## Other cards in this set

### Card 2

#### Front

Force is proportional to the rate of change of momentum

#### Back

Newton's Second Law

### Card 3

#### Front

When one body exerts a force on another the other body exerts a force that is equal in magnitude and opposite in direction on the first body

#### Back ### Card 4

#### Front

The force which gives a mass of 1 kg an acceleration of 1 ms^-2

#### Back ### Card 5

#### Front

The product of mass and velocity ; momentum is a vector

#### Back 