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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What is the direction of the rod's angular momentum vector (calculated about its lower end) ?

Options

A. vertical downwards
B. down at `20^(@)` to the horizontal
C. up at `20^(@)` to the horizontal
D. vertically upwards

Answer

B

Explanation

The centre of mass of the rod is moving like a conical pendulam with respect to its lower and