Question

A racing car has uniform acceleration of $4$ $m/s^2$. What distance will it cover in $10$ seconds after the start?

• A. $100$m
• B. $300$m
• C. $200$m
• D. $400$m

Answer 1

The correct option is C $200$m

Here initial velocity$=u$
final velocity$=v$
acceleration$=a$
time$=t$

$u=0$

$a=4$

$t=10$

$-v=u+at$

$v=0+40$

$v=40\frac{m}{s}$

$-2as=v^2-u^2$

$2\times 4\times s=1600$

$s+\frac{1600}{8}=200m$