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A body of mass 5 kg starts from the orig...

A body of mass 5 kg starts from the origin with an initial velocity `vecu=(30hati+40hatj)m s^(-1)`. If a constant force `(-6hati-5hatj)` N acts on the body, the time in which the y-component of the velocity becomes zero is

A

5s

B

20s

C

40s

D

80s

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The correct Answer is:
C
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