Problem: A 710 kg car drives at a constant speed of 23 m/s. It is subject to a drag force of 500 N. What power is required from the car's engine to drive the car (a) on level ground? (b) up a hill with a slope of 2.0°?

FREE Expert Solution

Power:

P=Wt=Fxcosθt

(a)

θ = 0° and Δx/tΔ = v

P = Fv

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Problem Details

A 710 kg car drives at a constant speed of 23 m/s. It is subject to a drag force of 500 N. What power is required from the car's engine to drive the car 

(a) on level ground? 

(b) up a hill with a slope of 2.0°?

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