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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

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