Question

For the equation $s=10t+4t^2$, what is the acceleration of the body? Assume that the body has a constant acceleration.

• A. $8m/s^2$
• B. $6m/s^2$
• C. $4m/s^2$
• D. $2m/s^2$

Answer 1

The correct option is A

$8m/s^2$

Given equation is $s=10t+4t^2$

$\Rightarrow s=10t+\frac{1}{2}\times 8t^2$

Comparing with the second equation of motion, $s=ut+\frac{1}{2}a{t}^2$, we get $a=8m/s^2$.