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Can anyone see where i have went wrong? I keep getting the same wrong answer.
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
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