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Most Important Selected Qs for JEE AdvancedPhysicsLaws of Motion

A 1 kg block moving on horizontal rough surface of friction coefficient 0.6 is pushed with a force varying with time t in seconds as shown in figure. If initial velocity of block was 4.5 ~m / s . Find the velocity (in m / s ) at t =3 ~s .

Correct answer

0

Step-by-step solution

f_k=6 ~N which will act till velocity is not zero. Let velocity becomes zero at t , then 0-4.5= ₀^t(3-3 t) d t t=3 so at t =3, v =0

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