Question

Starting from rest ,the acceleration of a particle is
a = 2(t-1). The velocity of the particle at t= 5 s
is :-
(1) 15 m/s (2) 25 m/s
(3) 5 m/s (4) None of these​

Answer 1

Answer:

1) 15 m/s

Explanation:

a=2(t-1)

a=2t-2

dv/dt = 2t-2

dv=2t-2 . dt

Integrating both sides,

v=2t²/2-2t

Put t=5 s

v=5²-2*5

v=25-10

v=15 m/s