Question

a body of mass 4 kilogram is thrown vertically upwards with an initial velocity of 20 m per second find initial kinetic energy and find out potential energy when body is at its maximum height​

Answer 1

intial k.e. = final p.e.

$= \frac{1}{2} \times 4 \times {20}^{2} = 800joule$

Answer 2

Hey friend....

Here is your answer...

K.E=1/2 mv ^2

K.E = 1/2 *4*400

K.E = 800 joule.

By using third eq. Of motion we will get h = 20m

P.E = mgh

P.E = 4*10*20

P.E=800 joule.

HOPE that it will help you...

Have a good day.....