Question

If velocity of a particle is given by $v=2t-1$, then find the acceleration of particle at $t=2s$.

• A. $2{\text{m/s}}^2$
• B. $4{\text{m/s}}^2$
• C. $8{\text{m/s}}^2$
• D. $6{\text{m/s}}^2$

Answer 1

The correct option is A $2{\text{m/s}}^2$

Given,
$v=2t-1$
$\Rightarrow a=\frac{dv}{dt}=\frac{d}{dt}(2t-1)=2$
$\therefore a=2{\text{m/s}}^2$