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A rod of mass 'm and length L is attache...

A rod of mass 'm and length L is attached to a L shaped plank at 'A'. rod can move freely about A. A string is tied between rod and plank as shown in figure. Whole system is moving with a constant acceleration g in x-direction

If string is cut at any instant then the angular acceleration of rod (with respect to the plank) at that instant is

A

B

C

D

Text Solution

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`mgl/2 =((ml^(2))/3) alpha`
`rArr alpha=(3g)/(2l)`
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