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Saturday 15 December 2012

P.No.4.7:- A force (thrust) of 400N is required to overcome road friction and air resistance in propelling an automobile at 80km/h. What power (kW) must the engine develop?


P.No.4.7:-   A force (thrust) of 400N is required to overcome road friction and air resistance in propelling an automobile at 80km/h. What power (kW) must the engine develop?
Solution:-
Given Data:-

                      P = 8.9 × 10³ W         (J/s = W   &    10³ =  1k)               
                      P = 8.9 kW         Ans:                       

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