Find the force required to be applied at the middle of a spanner of length 20cm to produce a turning effect of 100dyne.cm.
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Explanation:
The question is incomplete because of the following points
Total time duration for which the torque is being applied is to be mentioned.
Amount of rotation achieved by applying this torque is to be mentioned.
If you are really interested in knowing in knowing the smaller details about the energy spend, then stiffness of all the mechanical elements involved should be mentioned. This is required for calculating the strain energy stored and later released as heat energy.
Coefficient of friction between the spanner and nut head / bolt head and between nut and bolt should be mentioned.
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