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a car with a mass of 400kg is powered by an engine delivering a 45hp . at what maximum speed will it go up in 15° [neglect frictional force] |
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Answer» Mass of a car = 400kg Power = 45 HP v = ? Power = work done/ time = Fs cosθ / T F = mass × gravity Force = mass ×Accerlation due to gravity F = mg cos θ Hence Power = mg cosθ v 45×746 = 400×10×cos15°×v 45×746 /400×10×cos15 = v 373 /2 ×100 = v 3.73 / 2 = v please mark mebrain mark LIST |
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