Moments levers and gears

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12 Terms

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Moment of a force

force x distance

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what is moment measured in

newton metres

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what is moment

turning effect of a force acting about a point

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What distance measurement is used when calculating a moment?

The perpendicular distance from the pivot (at right angle) and the place where force is being applied

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3 Parts of a Lever System

Load, effort, fulcrum

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moment on balanced see saw

anticlockwise moment=clockwise moment

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levers

transmit turning effect of a force

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weight equation

weight(newtons)=mass(kg) x gravitational field strength (newtons)

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How can a lever be used as a force multiplier?

If the distance between the effort and pivot is greater than the distance between the pivot and load, the force applied on the load is greater than the effort force. This is since the moment on both the effort and load must be the same.

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gears

transmitting turning effects

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driven gear is larger means

rotate more slowly but greater moment

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driven gear smaller means

rotate more quickly but smaller moment