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

A body of mass 5 kg statrs from the origin with an initial velocity `vec(u) = (30 hat(i) + 40 hat(j)) ms^(-1)`. If a constant force `(-6 hat(i) - 5 hat(j))N` acts on the body, the time in which they component of the velocity becomes zero is

A

5 s

B

20 s

C

40 s

D

80 s

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