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A weightless rod is acted on by upward p...

A weightless rod is acted on by upward parallel forces of `2 N` and `4N` ends `A` and `B` respectively. The total leng th of the rod `AB=3m`. To keep the rod in equilibrium a fo rce of `6 N` should act in the following manner :

A

Downward at any point between A and B

B

Downward at mid point of AB

C

Downward at a point C such that AC=1 m

D

Downward at a point D such that BD=1 m

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The correct Answer is:
D
force 6N is applied in such a way that the torque about any point on rod should be zero.
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