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Suppose the vehicle is running at a constant speed on the flat road with rolling resistance = 100 N and aerodynamic resistance = 100 N, what is the traction force required?(a) 100 N(b) 0 N(c) 200 N(d) 50 NThe question was posed to me in an interview for internship.The query is from Vehicles and Powertrain topic in portion Emission Control Methods, Electric & Conventional Vehicles of Automobile Engineering

Answer»

Correct choice is (C) 200 N

For explanation I would say: FNET = Ftraction – Frolling – Faerodynamic – Fgradient = 0 N (constant speed). Flat ROAD ⇒ Fgradient = 0. HENCE Ftraction = Frolling + Faerodynamic + Fgradient = 100 + 100 + 0 = 200 N.



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