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A body of mass m thrown vertically upwar...

A body of mass m thrown vertically upwards attains a maximum height h. At height will its kinetic energy be 75% of its intial value?

A

`(h)/(6)`

B

`(h)/(5)`

C

`(h)/(4)`

D

`(h)/(3)`

Text Solution

Verified by Experts

The correct Answer is:
C
(c ) From conservation of mechamical energy, we have
`:. " "(3)/(4)mgh+mgh'=mgh " or "h'=(h)/(4) implies(1)/(2)mv_(i)^(2)=mgh`
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