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Unformatted text preview: nichols (scn285) Homework #5 Erskine (58200) 1 This print-out should have 19 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. 001 10.0 points There is friction between the block and the table. The suspended 3 kg mass on the left is moving up, the 2 kg mass slides to the right on the table, and the suspended mass 7 kg on the right is moving down. The acceleration of gravity is 9 . 8 m / s 2 . 3 kg 2 kg 7 kg = 0 . 14 What is the magnitude of the acceleration of the system? Answer in units of m / s 2 . 002 10.0 points The suspended 2 . 6 kg mass on the right is moving up, the 2 . 2 kg mass slides down the ramp, and the suspended 8 . 1 kg mass on the left is moving down. There is friction between the block and the ramp. The acceleration of gravity is 9 . 8 m / s 2 . The pulleys are massless and frictionless. 2 . 2 k g = . 1 7 37 8 . 1 kg 2 . 6 kg What is the tension in the cord connected to the 8 . 1 kg block? Answer in units of N. 003 10.0 points A block sits motionless on an inclined plane, held in place by friction. The plane could be tilted even more upwards and the block would remain motionless. M s Consider the following statements: I. The magnitude of the frictional force equals M g sin . II. The magnitude of the frictional force is less than M g sin . III. The magnitude of the frictional force is greater than s M g sin . IV. Static friction must vanish since the block is not moving....
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