A 710kg car drives at a constant speed of 23m/s . It is subject to a drag force of 500 N.?

Question

Question

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 degrees?

science physics

Answer 1

Answer #1

Given

Mass , m = 710 kg

speed, v = 23 m/s

Drag force ,Fd = 500N

a)Power P = Fd *v

= 500 N *23 m/s

P = 11500 watts

b)The force acting on car is Fd +mgsin2

Power P = (Fd+mgsin2) *v

= (500 N+710 kg *9.8 m/s^2*0.034) *23 m/s

P = 16941 watts

Answer 2

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