solution1001

# solution1001 - ikram(ai2734 hw1001 Swinney(58785 This...

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ikram (ai2734) – hw1001 – Swinney – (58785) 1 This print-out should have 7 questions. Multiple-choice questions may continue on the next column or page – fnd all choices beFore answering. Please study any test problems that you missed and discuss them with an instructor (LA, TA, Swinney) at o±ce hours. 001 10.0 points The amount oF work done by two boys who apply 300 N oF Force in an unsuccessFul at- tempt to move a stalled car is 1. 600 N. 2. 300 N · m. 3. 0. correct 4. 300 N. 5. 600 N · m. Explanation: W = F d , so with an unsuccessFul attempt to move the car, no work was done. 002 10.0 points At a certain point, when a spring is stretched near its elastic limit, the spring Force satisfes the equation F = - α x + β x 3 , where α = 14 N / m and β = 13000 N / m 3 . Calculate the work done by the spring when it is stretched From its equilibrium position to 0 . 042 m past its equilibrium. Correct answer: - 2 . 23499 mJ. Explanation: The work done is Found by integrating the Force oF the spring over the distance it is com- pressed: W = i x f x i F dx .

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solution1001 - ikram(ai2734 hw1001 Swinney(58785 This...

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