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What is a moment?
The turning effect of a force is called it's moment.
What is the equation used to measure the size of the moment?
M = f × d
M = moment of the force, newton - metres (Nm)
f = force, newtons (N)
d = perpendicular distance from the line of action of the force to the pivot, metres (m)
You can increase the moment by...
-increasing the force
-increasing the distance to the pivot
It is easier to undo a wheel-nut by:
-Using a long spanner
-Using a short spanner
And why?
-the long spanner because it increases the distance between the line of action of the force and the pivot.
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