Culate the distance trvelled in (141 grain starting from rest attains a velocity of 72km/hr in 5 minutes. Assuming that the a unitom find the acceleration (1) the distance by the train for attaining this velocity
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Culate the distance trvelled in (141 grain starting from rest attains a velocity of 72km/hr in 5 minutes. Assuming that the a unitom find the acceleration (1) the distance by the train for attaining this velocity
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Answer:
[tex]50\,m[/tex]
Explanation:
Since there is a uniform acceleration, you can use any of the 4 formulae for linear motion (I hope you are aware of them: [tex]v=u+at[/tex] and so on.
Before you calculate what is asked, you need to convert the velocity into limits of [tex]m/s[/tex].
[tex]\begin{aligned}v&=72\,km/h\\v&=\frac{72\times1000\,m}{3600\,s}\\&=20\,m/s\end{aligned}[/tex]
Then you can apply the formula as shown below to get the answer.(use of this formula is direct compare to first find the uniform acceleration and then find the travelled distance.)
[tex]\begin{aligned}s&=\frac{(v+u)}{2}t\\&=\frac{(20\,m/s+0)}{2}\times5\,s\\&= 50\,m\end{aligned}[/tex]