Question

20.) A 2.2 kg block starts from rest on a rough inclined plane that makes an angle of 25° with the horizontal.
The coefficient of kinetic friction is 0.25. As the block goes 2.0 m down the plane, the mechanical energy
of the Earth-block system changes by
(1) Zero
(2) -9.8 J
(3) 9.8 J
(4) -18 J
(5) 18 J
is
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Answer 1

I hope this will helps you !

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Answer 2

Explanation:

option 3 is correct answer mate

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