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A uniform rod is fixed to a rotating tur...

A uniform rod is fixed to a rotating turntable so that its lower end is on the axis of the turntable and it makes an angle of `20 %` to the vertical. (The rod is thus rotating with uniform angular velocity about a vertical axis passing through one end.) If the turntable is rotating clockwise as seen from above.
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Is there a torque acts on it, and it so in what direction ?

A

yes, vertically

B

yes horizontally

C

yes at `20^@` to the horizonal

D

no

Text Solution

Verified by Experts

The correct Answer is:
B
Since due to rotation of rod only `L_(x)` changes therefore torque is acting along `x` axis `tau_(x) = ((dL_(x))/(dt))`
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