Can anyone see where i have went wrong? I keep getting the same wrong answer.(adsbygoogle = window.adsbygoogle || []).push({});

A 1100 kg car accelerates from rest reaching a distance of 110 m in 8.7 seconds, determine the average power in KW required to achieve this acceleration (your answer should be to 2 decimal places).

ANS = 40.43

MY ANS = 20.21

Working out

V = d/t

V= 110/8.7 = 12.64

Acc = (12.64 - 0) / 8.7 = 1.45

Force = ma

Force = 1100 x 1.45 = 1598.63

Work done = force x distance

Work done = 1598.63 x 110 = 175848

Power = WD/T

Power = 175848/8.7 = 20.21KW

Thanks

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# Homework Help: Simple Power calculation

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