Question

A train starting from a railway station and moving with uniform acceleration attains a speed $40km{h}^{-1}$ in $10$ minutes. Find its acceleration.

• A. $0.0185m/s^2$
• B. $0.0195m/s^2$
• C. $0.0165m/s^2$
• D. $0.0135m/s^2$

Answer 1

Answer: (A)

$0.0185m/s^2$

Here we have, initial velocity,$v=40$km/h$=11.11$m/s

Time $t=10$minutes$=60\times 10=600$secs

We know that $v=u+at$

$\Rightarrow 40km{hr}^{-1}=0+a\times 10$m

$\Rightarrow 11.11m{s}^{-1}=a\times 600$secs

$\Rightarrow \frac{11.11}{600}=0.0185m{s}^{-2}$