Question

A 60 gm tennis ball thrown vertically up at 24 m/s rises to a maximum height of 26 m . What was the work done by resistive forces ,​

Answer 1

Hey friend..

Here is your answer-

let,

mass = 60gm = 0.06 kg

velocity = 24m/s

height(max) = 26m

Work done by gravitational force = -mgh

= -0.06 × 10 × 26

= -15.6 J

Work done by gain in kinetic energy = 1/2mv^2

= 1/2 × 0.06 × 24 × 24

= 17.28 J

Now, By work energy theorem.

Work done = 17.28 - 15.6

= 1.68 J

Therefore, work done by resistive forces is 1.68J.

Hope it helps you..!!

Answer 2

Explanation:

hyy bhai please refer to attachment

hope its help uhh

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