Question

NEED EXPLATION....
ANSWER IS (1)
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:

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Answer 2

$\huge\boxed{ANSWER:-}$

Given,

a = (2t-1)

so,

to find velocity from acceleration..we have to integrate it

integration of a = integration of (2t-1)

V= 2t²/2 - 2t

putting the given value of t = 5sec

V = 25 - 10

V = 15 m/sec

$\boxed{option\:1\:is\: correct}$