A rod of length L is sliding on a fricti...

A rod of length L is sliding on a frictionless surface as shown in the figure. Velocity of end A is `4m//s` along the wall. Find the velocity of end B, when end B makes `30^(@)` with wall PQ.

`8 m//s`

`2 sqrt( 3) m//s`

`4 sqrt( 3) m//s`

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

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