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Q.

A uniform rod of mass  'm'  and length  'l' is balanced on a triangular prism. (see figure). Now, one end of rod is cut by l4 and it is placed on the shortened end of the rod. Then

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a

the rod will remain in equilibrium

b

the rod starts rotating anticlockwise.

c

the center of mass of the rod will shift to the left.

d

the rod will start rotating clockwise.

answer is B, C.

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Detailed Solution

Torque due to gravity is more towards the longer end and center of mass will shift towards longer side

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