# HW11 - schneiter (tcs639) HW11 Ross (89152) This print-out...

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schneiter (tcs639) – HW11 – Ross – (89152) 1 This print-out should have 7 questions. Multiple-choice questions may continue on the next column or page – fnd all choices beFore answering. 001 (part 1 oF 3) 10.0 points A 1 . 41 kg ball is attached to a ceiling by a 1 . 57 m long string. The height oF the room is 5 . 41 m . The acceleration oF gravity is 9 . 8 m / s 2 . What is the gravitational potential energy associated with the ball relative to the ceil- ing? Correct answer: - 21 . 6943 J. Explanation: Given : m = 1 . 41 kg and Δ h 1 = - 1 . 57 m . U g = mg Δ h 1 = (1 . 41 kg) ( 9 . 8 m / s 2 ) ( - 1 . 57 m) = - 21 . 6943 J . 002 (part 2 oF 3) 10.0 points What is its gravitational potential energy rel- ative to the ±oor? Correct answer: 53 . 0611 J. Explanation: Let : h 2 = 5 . 41 m - 1 . 57 m = 3 . 84 m U g = mgh 2 = (1 . 41 kg) ( 9 . 8 m / s 2 ) (3 . 84 m) = 53 . 0611 J . 003 (part 3 oF 3) 10.0 points What is its gravitational potential energy rel- ative to a point at the same elevation as the

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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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HW11 - schneiter (tcs639) HW11 Ross (89152) This print-out...

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