Forces are applied on a wheel of radius 20 cm as shown in the figure. The torque produced by the forces 8 N at A, 8 N at E, 6 N at C and 9 N at D at angles indicated is
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a
5.4 N-m anti-clockwise
b
1.0 N-m clockwise
c
2.0 N-m clockwise
d
3.6 N-m clockwise
answer is B.
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Detailed Solution
Force 8 N can also be resolved in tangential and radial directions.τnet =9+8sin30°-8(0.2)N-m clockwise = 1.0 N-m clockwise