Physics Unit 3
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Forces can be used to turn objects about a pivot. What is this turning effect called?
What is the equation for calculating moments?
Moment (Nm) = Force (N) x Perpendicular distance between line of action and pivot (m)
What are the TWO ways of increasing the moment (or turning force)?
- Increasing the force applied
- Increase the perpendicul distance between the line of action of the force and the pivot
A man exerts a force of 120N and the perpendicular distance from his hand to the pivot is 15cm. What moment does he exert?
Explanation: Moment (Nm)=Force x Perpendicular distance...
- = 120 N x 0.15m
- = 18Nm
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