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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 `vec(u)=(30hati+40hatj)ms^(-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

Text Solution

Verified by Experts

The correct Answer is:
40
From Newton.s second law of motion,
`F_(y)=(DeltaP_(y))/(Delta t)`
`Delta t =(Delta P_(y))/(F_(y))`
`=(0-(5 xx 40))/(-5)=40s`
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