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A body of mass 2kg is projected from the...

A body of mass 2kg is projected from the ground with a velocity `20ms^(-1)` at an angle `30^(@)` with the vertical. If `t_(1)` is the time in seconds at which the body is projected and `t_(2)` is the time in seconds at which it reaches the ground, the change in momentum in `kgms^(-1)` during the time `(t_(2)-t_(1))` is

A

40

B

`40sqrt3`

C

`50sqrt3`

D

60

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The correct Answer is:
B
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