Q8 of 42 Page 29

A body with mass 5 kg is acted upon by a force F = (-3î+ 4ĵ) N. If its initial velocity at t = 0 is v = (6î - 12ĵ) m s-1, the time at which it will just have a velocity along the y-axis is

We have to find the time at which the final velocity along the y axis which means x-component will be zero. We have

x now X-component



Therefore, option (b) is correct

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