InterviewSolution
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InterviewSolution
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If `vec F` is the force acting in a particle having position vector `vec r` and `vec tau` be the torque of this force about the origin, thenA. `vec r. vec tau ne 0 and vec F. vec tau = 0`B. `vec r. vec tau gt 0 and vec F. vec tau lt 0`C. `vec r. vec tau = 0 and vec F. vec tau = 0`D. `vec r. vec tau = 0 and vec F. vec tau ne 0` |
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Answer» Correct Answer - C ( c) Torque is an axial vector i.e., its direction is always perpendicular to the plane containing vectors `vec r` and `vec F`. `vec tau = vec r xx vec F` Torque is perpendicular to both `vec r` and `vec F` :. `vec tau . vec r = 0` `vec F . vec tau = 0`. |
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