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A child is swinging a swing. Minimum and...

A child is swinging a swing. Minimum and maximum heights fo swing from the earth's surface are 0.75 m and 2 m respectively. The maximum velocity of this swing is

A

`5m//s`

B

`10m//s`

C

`15m//s`

D

`20m//s`

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The correct Answer is:
a
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