PHY2053 Physics 1, Test 2 Exam With Answers Version C - 1 A uniform beam of length 4.0 m and weight 100 N is mounted on an axle at one end perpendicular

PHY2053 Physics 1, Test 2 Exam With Answers Version C - 1 A...

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____ 1. A uniform beam of length 4.0 m and weight 100 N is mounted on an axle at one end perpendicular to the length of the beam. A rope is attached to the end of the beam at the other end from the axle and the beam is lifted by the rope so that the beam makes an angle of 30° with the horizontal. What is the tension in the rope if it is straight up? a. 50 N b. 87 N c. 100 N d. 200 N ____ 2. A 4.2-kg mass is placed at (3.0, 4.0) m. Where can an 8.4-kg mass be placed so that the moment of inertia about the z-axis is zero? ____ 3. A bucket of water with total mass 23 kg is attached to a rope, which in turn is wound around a 0.050-m radius cylinder at the top of a well. The bucket is raised to the top of the well and released. The bucket is moving with a speed of 8.0 m/s upon hitting the water surface in the well. What is the angular speed of the cylinder at this instant? ____

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