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What you need to know
Reflections and Exam tips
The turning effect of a force is called the MOMENT which can be increased by:
Moment (Newton metres, Nm)= force (Newtons, N) x perpendicular distance from pivot (Metre, m)
Example: Levers reduce the force needed to perform tasks such as lifting a heavy object.
Less force is needed to open a door by pushing at the side furthest from the hinge than at the side closest to the hinge as there is greater momentum.
If an object is not turning around a pivot, the total clockwise moment is balanced by the total anti-clockwise moment.
sum of the clockwise moments = sum of the anti-clockwise moments
Example using a see-saw: