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 :
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.
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