Another word for a turning force is called its moment
Force
An action that stretches/ compresses an object, or cause it to slow down, speed up or change its direction of motion.
Pivot/ fulcrum
The point at which an object turns
Handle
The place from which a force is exerted by your hands
How do I calculate the moment?
MOMENT = FORCE X PERPENDICULAR DISTANCE FROM PIVOT
moments are measured in…
Newton metres, Nm
Force is measured in…
Newtons, N
Perpendicular distance from pivot is measured in…
metres, m
How do I increase the moment?
You can increase the moment you exert- or produce the same moment with a smaller force- by moving the force as far away from the pivot as possible.
Give examples of how moments are increased.
A door ( handle placed as far away from the hinges as possible)
Nutcrackers (long handles so that a smaller force will crack the nut)
Bottle opener (a long top will decrease the amount of force needed)
For a seesaw to be in equilibrium (balanced) the anticlockwise moment must be equal to the clockwise moment. This is called the PRINCIPLE OF MOMENTS. How do I work out the principle of moments?
FORCE ON LEFT X PERPENDICULAR DISTANCE FROM PIVOT
= FORCE ON RIGHT X PERPENDICULAR DISTANCE FROM PIVOT