Question

when work done by force of gravity is negative then?
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dani​

Answer 1

Explanation:

when the ball is moving upward then the direction of the force of gravity on the ball is downward which is opposite to the motion of of ball in upward direction

that's why work done by force of gravity is negative

Answer 2

Explanation:

If the object goes up (the height increases so Δh is positive) then the work done by gravity is negative and tries to make the object's KE decrease. If the object goes down (the height decreases so Δh is negative), the work done by gravity is positive so it tries to make the object's KE increase.

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