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A ball is connected to an ideal string o...

A ball is connected to an ideal string of length l=1.0 m whose other endis fixed to the point A. ball is released from the point B such that it can move in the vertical plane. Height of the point A above the ground is more than the length of string.The velocity of the ball at the lowest point of its motion is

A

5.0 m/s

B

7.21 m/s

C

1.25 m/s

D

`sqrt(30)`m/s

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