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Figure shows a lamina in x-y plane. Two ...

Figure shows a lamina in `x-y` plane. Two axes `z` and `z'` pass perpendicular to its plane. A force `F` acts in the plane of lamina at point `P` as shown. Which of the following statements is incorrect ?
(The point `P` is closer to `z'-axis` than the z-axis).
.

A

Torque `tau` caused by `F` about `z` axis is along `-hatk`

B

Torque `tau'` caused by `F` about axis is along `-hatk`

C

Torque `tau` caused by `F` about axis is greater in magnitude then that about `x` axis.

D

Total torque is given be `tau=tau+tau'`

Text Solution

Verified by Experts

The correct Answer is:
B
`bar(tau)=bar(r)xxbar(E)` about `z`-axis along `hatk`
`bar(tau')=bar(r')xxbar(F)` which is along `-hatk`
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