A particle of mass m is projected at an angle α to the horizontal with an initial velocity u . The work done by gravity during the time it reaches its highest point is -

Question

A particle of mass m is projected at an angle α to the horizontal with an initial velocity u . The work done by gravity during the time it reaches its highest point is -, mu 2 sin 2 α, m u 2 c o s 2 α 2, m u 2 s i n 2 α 2, – m u 2 s i n 2 α 2

MARKS App · Accepted Answer

W g = − Δ U Work done by gravity = decrease in potential energy W = − mgH = – mg u 2 sin 2 α 2 g = – m u 2 s i n 2 α 2

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