HW10 - schneiter (tcs639) – HW10 – Ross – (89152) 1...

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Unformatted text preview: schneiter (tcs639) – HW10 – Ross – (89152) 1 This print-out should have 8 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 (part 1 of 3) 10.0 points A 1250 kg car accelerates uniformly from rest to 14 . 6 m / s in 4 . 55 s. Find the work done on the car in this time interval. Correct answer: 133 . 225 kJ. Explanation: Given : m = 1250 kg , v f = 14 . 6 m / s , and Δ t = 4 . 55 s . W = Δ K = 1 2 mv 2 f- = 1 2 (1250 kg) (14 . 6 m / s) 2 · 1 kJ 1000 J = 133 . 225 kJ . 002 (part 2 of 3) 10.0 points Find the average power delivered by the en- gine in this time interval. Correct answer: 39 . 2496 hp. Explanation: P = W Δ t = parenleftbigg 133 . 225 kJ 4 . 55 s parenrightbiggparenleftbigg 1000 J kJ parenrightbiggparenleftbigg 1 hp 746 W parenrightbigg = 39 . 2496 hp . 003 (part 3 of 3) 10.0 points Find the instantaneous power delivered by the engine at t = 1 . 69 s....
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This note was uploaded on 04/23/2009 for the course PHYS 152 taught by Professor Button during the Spring '08 term at IUPUI.

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HW10 - schneiter (tcs639) – HW10 – Ross – (89152) 1...

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