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linnus
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Homework Statement
The Porsche® 911 GT3 has a 380 hp engine and a mass of 1.4×103 kg. The car can accelerate from 0 to 100 km/h in 4.3 seconds. What percentage of the power supplied by the engine goes into making the car move? Assume that the car's acceleration is constant and that there are 746 Watts/hp.
Homework Equations
p=w/t
k=1/2mv^2
a=v/t
The Attempt at a Solution
Not sure...