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 $t = 3 s$ .

Question

TestHub · Accepted Answer

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 ) dt ⇒ t = 3 so at t = 3 , v = 0

Physics - NLM Question with Solution | TestHub

Doubts & Discussion