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Moment of a force
force x distance
what is moment measured in
newton metres
what is moment
turning effect of a force acting about a point
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
3 Parts of a Lever System
Load, effort, fulcrum
moment on balanced see saw
anticlockwise moment=clockwise moment
levers
transmit turning effect of a force
weight equation
weight(newtons)=mass(kg) x gravitational field strength (newtons)
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.
gears
transmitting turning effects
driven gear is larger means
rotate more slowly but greater moment
driven gear smaller means
rotate more quickly but smaller moment