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CBSE Class 9 Answered

One car {A} does work in 10 seconds . Another car {B} does the same work in 5 seconds . Which car will consume more fuel in doing the same amount of work ?

Asked by pahiroy1221 | 18 Jan, 2016, 04:54: PM
answered-by-expert Expert Answer
begin mathsize 12px style Power equals fraction numerator Energy space consumed over denominator Time space taken end fraction end style
Here, TB = 5 s  TA = 10 s 
Thus, we can see that power is inversely proportional to time so if time increases power will be reduced and if power reduces then energy would be increased. If energy increases then more fuel is consumed.
Thus, the car B will consume more fuel in doing the same amount of work.
Answered by Yashvanti Jain | 19 Jan, 2016, 12:00: PM

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