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Unformatted text preview: Sonia Rahangdale- PHY 231 Fall 2006 1 Set 06 (10/17 midnight) Due date: Tue Oct 17 23:59:00 2006 An air puck of mass 0.519 kg is tied to a string and allowed to revolve in a circle of radius 1.15 m on a frictionless horizontal table. The other end of the string passes through a hole in the center of the table, and a mass of 1.14 kg is tied to it as seen in the figure. The suspended mass remains in equilibrium while the puck on the tabletop revolves. What is the tension in the string? Tries 0/12 What is the magnitude of the force which causes the cen- tripetal acceleration of the puck? Tries 0/12 What is the speed of the puck? Tries 0/12 A proposed space station includes living quarters in a circular ring 57.0 m in diameter. At what angular speed should the ring rotate so the occupants feel that they have the same weight as they do on Earth? Tries 0/12 A mass of 5.90 kg is suspended from a 1.51 m long string. It revolves in a horizontal circle as shown in the figure. 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 R The tangential speed of the mass is 3.78 m/s. Calculate the angle between the string and the vertical. Tries 0/12 A section of a high speed test track is circular with a radius of curvature R = 1380 m. At what angle of should the track be inclined so that a car traveling at 63.0 m/s (141 mph) would keep moving in a circle if there is oil on that section of the track, i.e., it would not slip sideways even with zero friction on that section. (Hint: The cars vertical acceleration is zero.) Tries 0/12 The radius of curvature of a highway exit is r = 71.5 m. The surface of the exit road is horizontal, not banked. (See figure.)surface of the exit road is horizontal, not banked....
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