# what is the average power generated by a 1200 kg car as it accelerates from rest to 20 m/s in 10 s?

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• Given,

Average Power (Pavg) =?

Mass (m) = 1200 kg

Initial Velocity (u) = 0m/sec

final Velocity (v) = 20 m/sec

Time (t) = 10 sec

We know that,

Average Power (Pavg) = Energy change/ Time

= [½ m (Δv)²]/ Time (t)

= m (v - u)²/ 2 x t

= (1200 [20 - 0]²)/ 2 x 10

= (1200 x 400)/ 20

= 24000 W

∴ Average Power (Pavg) = 24 kw

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• Anonymous
6 months ago

you eat fart and smell fart

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• The first step is to calculate the car’s kinetic energy.

Initial KE = ½ * 1200 * 20^2 = 240,000 J

Power = 240,000 ÷ 10 = 24,000 watts

• Andrew Smith
Lv 7
6 months agoReport

which means 24 kW or about 31 Hp at the wheels. The engine develops more than this but some of the power is used for other purposes.

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• Yeah, yeah..... just gimme the answer and I might award best answer but probably not.

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