Question

A coconut of mass m kg falls its tree through a vertical distance m and could reach ground with a velocity of v ms^-1due to air
resistance. Work done by air resistance is
(1) -m/g(2gs-v^2), (2) -1/2mv^2, (3) -mgs, (4) mv^2+3mgs​

Answer 1

heya mate!

Answer=>(3)-mgs

Explanation:Work done by non conservative force is change in potential energy.

Here final potential energy is 0.

Initial Potential energy is mgs .

So work done by air resistance=-mgs.

Tysm!

Answer 2

Answer:

I hope option (3) - mgs is the best answer.