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hw 15 - Patel(pnp223 homework 15 Turner(92160 This...

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Patel (pnp223) – homework 15 – Turner – (92160) 1 This print-out should have 12 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 Given: A block is pulled at a constant speed along a horizontal surface by a rope with ten- sion F T . The rope is inclined at an angle from the horizontal as shown in the figure below. The block moves a distance 13 m along the horizontal surface. The acceleration of gravity is 9 . 8 m / s 2 . 39 kg μ = 0 . 63 F T 43 What is the net work done by all the forces acting on the block? 1. W net = - 1838 . 74 J 2. W net = 0 3. W net = - 4968 . 6 J 4. W net = 4968 . 6 J 5. W net = 3130 . 22 J 6. W net = - 3130 . 22 J 7. W net = 1971 . 81 J 002 (part 2 of 2) 10.0 points Suppose that the force on the block F T is in- creased so that the block accelerates (starting from rest) at a = 1 . 6 m / s 2 . Now what is the net work done by all the forces acting on the block as it moves a dis- tance of 13 m? 1. W net = 1971 . 81 J 2. W net = - 811 . 2 J 3. W net = - 1971 . 81 J 4. W net = 2482 . 81 J 5. W net = 811 . 2 J 6. W net = 1460 . 81 J 003 (part 1 of 2) 10.0 points
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