If length of a spanner is 'I' and a force 'F' is applied on it to tighten a nut such that it passes through the pivot point, then torque is:
Correct answer: A. Zero
- A. Zero
- B. Fl
- C. Fl sin θ
- D. Fl sin θλ
Explanation
The torque exerted by a force is calculated as the product of the force and the perpendicular distance from the pivot point to the line of action of the force. If the line of action of the force passes through the pivot point, this perpendicular distance is zero, resulting in zero torque. Therefore, Option A is correct. Options B, C, and D suggest non-zero torque values that do not apply in this scenario because the perpendicular distance is zero.
This question appeared on the UHS MDCAT 2010 paper, which you can sit online with every answer explained.
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