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solution_pdf3e - Patel(sap785 homework#9 shubeita(58645...

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Patel (sap785) – homework #9 – shubeita – (58645) 1 This print-out should have 5 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 (part 1 of 2) 10.0 points A block on a horizontal frictionless plane is attached to a spring, as shown below. The block oscillates along the x -axis with simple harmonic motion of amplitude A . m k 0 A + A v x 0 Which statement about the block is cor- rect? 1. At x = 0, its velocity is zero. 2. At x = A , its acceleration is zero. 3. At x = 0, its acceleration is at a maxi- mum. 4. At x = A , its velocity is at a maximum. 5. At x = A , its displacement is at a maxi- mum. correct Explanation: The block oscillates from maximum dis- placements at x = A and x = A . At those points the velocity is momentarily zero. 002 (part 2 of 2) 10.0 points Which statement about energy is correct? 1. The potential energy of the spring is at a minimum at x = 0. correct 2. The kinetic energy of the block is at a maximum at x = A .
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