Question

A particle starts from rest and moves with an acceleration of $a=2+(t-2)|m/s^2$, the velocity of the particle at t=4 sec is

• A. 2 m/s
• B. 4 m/s
• C. Zero
• D. 12 m/s

Answer 1

The correct option is B 4 m/s

Given,

$u=0$

$t=4$

Here we have to find the velocity of the particle hence we need the acceleration at $t=3sec$

So,

$a=2+(t-2)$

Substituting $t=4sec$