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A ball whose kinetic energy is E, is thr...

A ball whose kinetic energy is E, is thrown at an angle of `45^(@)` with the horizontal. Its kinetic energy at the highest point of its flight will be :

A

E

B

`E//sqrt(2)`

C

`E//2`

D

zero

Text Solution

Verified by Experts

The correct Answer is:
3
Kinetic energy of a projectile at the highest point `=E cos^(2) (theta)` where E is the kinetic energy of projection, `theta` is the angle of projection.
`E_("highest point")=E(cos 45^(@))^(2)=E(1/sqrt(2))^(2)=E/2`
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