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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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Knowledge Check

  • The height of a swing changes during its motion from 0.1 m to 2.5 m . The minimum velocity of a boy who swings in this swing is

    A
    5.4 m/s
    B
    4.95 m/s
    C
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    D
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  • A girl in a swing is 2.5 m above ground at the maximum height and at 1.5 m above the ground at the lowest point. Her maximum velocity in the swing is (g = 10 ms^(-2))

    A
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    B
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    C
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    D
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