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A particle of mass m is projected at an ...

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

A

`m u^(2) sin^(2)alpha`

B

`(m u^(2) cos^(2)alpha)/(2)`

C

`(m u^(2)sin^(2)alpha)/(2)`

D

`-(m u^(2)sin^(2)alpha)/(2)`

Text Solution

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The correct Answer is:
D
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