In this question you will use a simple model to estimate how the energy used(adsbygoogle = window.adsbygoogle || []).push({});

by a car depends on its design and how it is driven. Begin by neglecting air

and ground resistance, and assume that the car travels at constant velocity

between regular equally spaced stops.

(a) A stationary car of mass m is rapidly accelerated to a velocity v, driven

for a distance s, and is rapidly brought to a halt by its brakes. Calculate

the energy dispersed by the brakes.

(b) Assuming the car restarts immediately, calculate the time between

subsequent stops and hence the average power dissipated.

(c) Hence or otherwise calculate the energy used in travelling a total distance

d.

(d) Taking m = 1000 kg, v = 10ms−1 and s = 100m calculate the energy

used in travelling 1 km. What would be the effect of doubling the speed

to 20ms−1?

I need help with this Question. It seems to be easy but I think I've got an error in my mind.^^

Thanks in advance!

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# Homework Help: Need help with calculus for a car! (admission test question)

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