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Question

A wheel of diameter 2 m is shown in the figure. A force F = 2 N is applied at B in the direction shown in figure. Calculate the moment of force about (i) centre O, and (ii) point A.



Correct Answer
A

2N.m, 4N.m

Your Answer
B

12N.m, 4N.m

Your Answer
C

2N.m, 8N.m

Your Answer
D

1N.m, 4N.m


Solution

The correct option is C

2N.m, 4N.m


Moment of force about O (as pivot) = F ´ d = 2 ´ 1 = 2 N.m (clockwise)

Moment of force about A (as pivot) = F ´ d = 2 ´ 2 = 4 N.m (clockwise)

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