PHY2053 Physics 1, Test 2 Exam With Answers Version B - 1 A vault is opened by applying a force of 300 N perpendicular to the plane of the door 0.80 m

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

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____ 1. A vault is opened by applying a force of 300 N perpendicular to the plane of the door, 0.80 m from the hinges. Find the torque due to this force about an axis through the hinges. a. 120 Nm b. 240 Nm c. 300 Nm d. 360 Nm ____ 2. A 3.0-m rod is pivoted about its left end. A force of 6.0 N is applied perpendicular to the rod at a distance of 1.2 m from the pivot causing a ccw torque, and a force of 5.2 N is applied at the end of the rod 3.0 m from the pivot. The 5.2 N is at an angle of 30to the rod and causes a cw torque. What is the net torque about the pivot? ____ 3. A bucket filled with water has a mass of 23 kg and is attached to a rope, which in turn, is wound around a 0.050-m radius cylinder at the top of a well. What torque does the weight of water and bucket produce on the cylinder if the cylinder is not permitted to rotate? (g= 9.8 m/s2)

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