Question: an electric car is climbing at 80 kmh up a...
An electric car is climbing at 80 km/h up a 5° incline against a
10 km/h headwind. The vehicle has the following attributes: mass m
= 1400 kg, drag coefficient CD = 0.19, vehicle cross section A =
2.4 m^2, coefficient of rolling resistance CR = 0.0044, wheel
radius r = 0.3 m, gear ratio from rotor to drive axle ng = 11, and
a nominal gear efficiency ηg = 95%. Assume a density of air ρair =
i) Calculate the rotor output torque and speed.
ii) How much greater is the power requirement for climbing the 5° slope compared to a flat road?