What are the conditions in which force can not produce torque
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here are the conditions of produce torque:Let's take a particular example of a disk rotating around an axis through its centre:

If the component of the torque parallel to the axis is TaTa then the disk will start to rotate according to the angular version of Newton's second law:
Ta=Iω˙(1)(1)Ta=Iω˙
where ω˙ω˙ is the angular acceleration and IIis the moment of inertia. The obvious way to make this rotate is to apply a tangential force:
In this case the magnitude of the torque is just T=rFT=rF and the direction of the torque vector is parallel to the axis so Ta=T=rFTa=T=rF and equation (1) tells us that the disk will start rotating.

If the component of the torque parallel to the axis is TaTa then the disk will start to rotate according to the angular version of Newton's second law:
Ta=Iω˙(1)(1)Ta=Iω˙
where ω˙ω˙ is the angular acceleration and IIis the moment of inertia. The obvious way to make this rotate is to apply a tangential force:
In this case the magnitude of the torque is just T=rFT=rF and the direction of the torque vector is parallel to the axis so Ta=T=rFTa=T=rF and equation (1) tells us that the disk will start rotating.
khan6368:
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