HW4 - Pickering, Tracey Homework 4 Due: Jan 30 2006, noon...

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Pickering, Tracey – Homework 4 – Due: Jan 30 2006, noon – Inst: Drummond 1 This print-out should have 11 questions. Multiple-choice questions may continue on the next column or page – fnd all choices beFore answering. The due time is Central time. 001 (part 1 oF 1) 10 points IF you drop an object, it accelerates downward at 9 . 8 m / s 2 (in the absence oF air resistance). IF instead you throw it downward, its down- ward acceleration aFter release is 1. 9 . 8 m / s 2 correct 2. less than 9 . 8 m / s 2 3. more than 9 . 8 m / s 2 Explanation: The acceleration oF all Freely Falling objects is g = 9 . 8 m / s 2 . 002 (part 1 oF 1) 10 points A ball is thrown upward. Its initial verti- cal speed v 0 , acceleration oF gravity g , and maximum height h max are shown in the fgure below. Neglect: Air resistance. The acceleration oF gravity is 9 . 8 m / s 2 . v 0 9 . 8m / s 2 h max What is its maximum height, h max (in terms oF the initial speed v 0 )? 1. h max = v 2 0 2 g 2. h max = 5 v 2 0 8 g 3. h max = 3 v 2 0 4 g 4. h max = 3 v 2 0 2 2 g 5. h max = 5 v 2 0 2 2 g 6. h max = v 2 0 4 g 7. h max = 3 v 2 0 2 g 8. h max = v 2 0 g 9. h max = v 2 0 2 g correct Explanation: Basic Concept: ±or constant accelera- tion, we have v 2 = v 2 0 + 2 a ( y - y 0 ) . (1) Solution: The velocity at the top is zero. Since we know velocities and acceleration, Eq.
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This note was uploaded on 06/23/2008 for the course PHY 303K taught by Professor Turner during the Fall '08 term at University of Texas.

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HW4 - Pickering, Tracey Homework 4 Due: Jan 30 2006, noon...

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