Q. Calculate the moment of force F = 2î + 3j-k newton acting at origin O about a point (1,-1,1) m?
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Torque about (0,0,0)
=r×f
=(i+3k)×(2i+3j)
=3k+6(+j)+9(+î)
∴TorqueaboutZaxis=coefficientof k
=3 N m
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