# Physics Unit 4 - Circular motion

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How do you convert degrees to radians?
pi/180
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What is angular displacement?
The vector measurement of the angle through which something has turned
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What is angular velocity?
The rate at which the angular displacement changes
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Why does a body moving at constant speed in a circular path need a resultant force acting on it?
Constant speed, velocity is continually changing direction, a change in velocity is an acceleration. There must be a force causing the acceleration, this force acts towards the centre
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What factors would require a larger force?
Higher mass, Higher velocity, Smaller radius
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If there was no resultant force on a body, what direction would the body travel?
The body would travel in a straight line along the tangent at the point it was released
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## Other cards in this set

### Card 2

#### Front

What is angular displacement?

#### Back

The vector measurement of the angle through which something has turned

### Card 3

#### Front

What is angular velocity?

### Card 4

#### Front

Why does a body moving at constant speed in a circular path need a resultant force acting on it?

### Card 5

#### Front

What factors would require a larger force?