Question

The acceleration of particle varies with time as
shown in figure. If particle start from rest, the
velocity of particle after 3 sec is
(1) zero
(2)2 m/s
(3) 3 m/s
(4) 4 m/s​

Answer 1

Answer:

Not sure I think 3metre/second

Answer 2

Answer: (3) 3 m/s

Explanation:

y=mx+c

a=mt+c

For t=1   0=m+c

For t=0 −2=0+c

c=−2

a=2t−2

dv/dt=2t−2

dv=(2t−2)dt

After you do the integration, you get- v=t^2-2t

V at t=3sec ------ 3^2-2*3= 3m/s