A 10 kg block is pulled in the vertical ...

A 10 kg block is pulled in the vertical plane along a frictionless surface in the form of an arc of a circle of radius 10m. The applied force is 200N as shown in the figure. If the block started from rest at A, the velocity at B would be:

The speed at Q is `20 m//s`.

The speed at Q is `20 sqrt( 3) m//s`

The speed at Q is `10 sqrt( 3) m//s`.

none of these

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