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Question
A wheel of diameter 2 m is shown in the figure with the axle at O. A force F = 2 N is applied at B in the direction shown in the figure. Calculate the moment of force about
- the centre O, and
- the point A.
Solution
Diameter of wheel = 2 m
Radius of wheel = `2/2` = 1 m
Force applied at B = 2 N
i. Moment of force at O (clockwise)
= 2 N × 1
= 2 N m
ii. Moment of force at A (clockwise)
= 2 N × 2m
= 4 N m
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