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

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

5 s

20 s

40 s

80 s

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