A central force is that which__________________?
Correct answer: B. Cannot produce torque
- A. Can produce torque
- B. Cannot produce torque
- C. Some time can produce torque some time cannot
- D. Has no relation with torque
Explanation
A central force acts along the line joining the body to the centre, so the position vector and force are parallel. Therefore torque τ = rF sin0° = 0, meaning the force cannot produce torque about the centre. Option a confuses an ordinary force with a central force that has a nonzero perpendicular component.
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