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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)theta)/(2)`

B

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

C

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

D

Zero

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The correct Answer is:
A
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