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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

`10ms^(-1)`

B

`5 ms^(-1)`

C

`8 m//s`

D

`15 ms^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
B
Maximum K.E = Drop in P.E.
`1/2 m V_("max")^(2)=mg(h_(2)-h_(1))impliesV_("max")=5ms^(-1)`
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