Topic 9-Forces and their effects
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What is moment?
the turning effect of the force
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What 2 things does the turning effect depend on ?
the size of the force
distance from pivot
distance from pivot
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moment=
force\*perpendicular distance
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Unit for moment:
Nm-newton metre
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What does the principle of moments?
The sum of all anticlockwise moments about a point=the sum of all of the clockwise moments about the same point
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The bigger the perpendicular distance,…………
the larger the moment
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def of thrust
the force causing an object to move
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What is a contact force?
A force which acts between objects that are physically touching
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Non-contact
A force which acts at a distance, without any contact between bodies.
Note 
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