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The lower end of a 4m long uniform rod A...

The lower end of a 4m long uniform rod AB is pulled with constant speed v = 4m/s. Then speed of centre of mass of the rod at `theta = 60^(@)` will be:

A

`4/sqrt(3) m//s`

B

`2sqrt(3) m//s`

C

4 m/s

D

`4sqrt(3) m//s`

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A
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