Question

A truck starts from rest and rolls down a hill with a constant acceleration. It travels a distance of $200m$ in $10s$. Find its acceleration

• A. $1m/s2$
• B. $5m/s2$
• C. $4m/s2$
• D. None

Answer 1

Answer: (A)

$1m/s2$

Given, Truck starts from rest, initial velocity $\left(u\right)=0m/s$
Distance covered $\left(S\right)=200m$
Time taken $\left(t\right)=10s$
$Mass=7metrictone=7\times 1000=7000kg$
final velocity $\left(v\right)=?$
$acceleration\left(a\right)=?$
$Force\left(F\right)=?$
Using equation of motion, $S=ut+\frac{1}{2}at2$, acceleration (a) is i.e. $200m=0+\frac{1}{2}\left(a\right)\left(10\right)2$
$\Rightarrow 200\times 2=a\times 400$
$\Rightarrow a=1m/s2$