Let $F $ be the force acting on a particle having position vector $\vec r$ and $\vec T$ be the torque of this force about the origin. Then ..
Let $F $ be the force acting on a particle having position vector $\vec r$ and $\vec T$ be the torque of this force about the origin. Then ..
- A
$\vec r.\vec T = 0\,{\rm{ and\, }}\vec F.\vec T = 0$
- B
$\vec r.\vec T = 0\,{\rm{ and\, }}\vec F.\vec T \ne 0$
- C
$\vec r.\vec T \ne 0\,{\rm{ and \,}}\vec F.\vec T = 0$
- D
$\vec r.\vec T \ne 0\,{\rm{ and \,}}\vec F.\vec T \ne 0$
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