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Questions  

A wheel of radius 20 cm has four forces applied to it as shown in fig. Then, the torque produced by these forces about O is

a
5.4 Nm anticlockwise
b
1.8 Nm clockwise
c
1.8 Nm anticlockwise
d
5.4 Nm clockwise

detailed solution

Correct option is B

Torque of 6 N force will be zero. Net torque isτnet = 4×20100-9×20100-8sin300×20100 = -1.8 NmNegative sign shows that this torque will be clockwise.

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