2. Solved Papers
  3. JEE Main & Advanced
  4. Physics
  5. Rotational Motion

JEE Main & Advanced Physics Rotational Motion JEE PYQ-Rotational Motion

  • question_answer
    Let F be the force acting on a particle having position vector r and t be the torque of this force about the origin. Then,                [AIEEE 2003]

    A)   \[r\,.\,\tau =0\] and \[F\,.\,\,\tau \ne 0\]

    B)        \[r\,.\,\,\tau \ne 0\] and \[F\,.\,\,\tau =0\]

    C)   \[r\,.\,\,\tau \ne 0\] and \[F\,.\,\,\tau \ne 0\]

    D)   \[r\,.\,\,\tau =0\] and \[F\,.\,\,\tau =0\]

    Correct Answer: D

    Solution :

    [d] The torque, \[\tau =r\times F\] As, \[\tau \] is perpendicular to both r and F, so r . \[\tau \]as well as F . \[\tau \] has to be zero.


You need to login to perform this action.
You will be redirected in 3 sec spinner