# Physics

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• Created by: elliesb
• Created on: 06-05-17 18:10
Principle of consevation of energy
Energy cannot be created or destroyed but can chage from one form into another
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Principle of consevation of momentum
Momentum in a collision is conserved provided there is no external force acting.
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Law of moments
When a body is in equilibrium the clockwise moments about a point equals the anticlockwise moments about the same point
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Electromotive force
Energy converted from other forms into electrical enerfy per column of charge leaving the battery
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Power
The rate of doing work
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Efficiency
The fraction of useful output energy to total input energy
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## Other cards in this set

### Card 2

#### Front

Momentum in a collision is conserved provided there is no external force acting.

#### Back

Principle of consevation of momentum

### Card 3

#### Front

When a body is in equilibrium the clockwise moments about a point equals the anticlockwise moments about the same point

### Card 4

#### Front

Energy converted from other forms into electrical enerfy per column of charge leaving the battery

### Card 5

#### Front

The rate of doing work