# HW 4 - lie(el7352 – WH04 – markert –(56480 1 This...

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Unformatted text preview: lie (el7352) – WH04 – markert – (56480) 1 This print-out should have 15 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 light, inextensible cord passes over a light, frictionless pulley with a radius of 7 . 6 cm. It has a(n) 14 kg mass on the left and a(n) 4 . 8 kg mass on the right, both hanging freely. Initially their center of masses are a vertical distance 2 . 9 m apart. The acceleration of gravity is 9 . 8 m / s 2 . 2 . 9 m 7 . 6 cm ω 14 kg 4 . 8 kg At what rate are the two masses accelerat- ing when they pass each other? Answer in units of m / s 2 . 002 (part 2 of 2) 10.0 points What is the tension in the cord when they pass each other? Answer in units of N. 003 10.0 points A force F = 92 . 8 N acts at an angle α = 38 ◦ with respect to the horizontal on a block of mass m = 25 . 8 kg, which is at rest on a horizontal plane. The acceleration of gravity is 9 . 81 m / s 2 . If the static frictional coefficient is μ s = . 84, what is the force of static friction? 25 . 8 kg μ s = 0 . 84 9 2 . 8 N 38 ◦ 1. 0 N 2. 212 . 602 N 3. 73 . 1274 N 4. 260 . 594 N 5. 164 . 61 N 6. 47 . 992 N 7. 151 . 175 N 8. 57 . 1334 N 9. 274 . 029 N 10.10....
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HW 4 - lie(el7352 – WH04 – markert –(56480 1 This...

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