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Unformatted text preview: Problem 31: The telltale on the sailboat shows the direction of the wind relative to boat. When the boat is not moving, the telltale indicates the wind direction towards east. As the boat sails towards north with a velocity of 5 miles per hour, the telltale shows the direction of the wind at 25 o south of east. What is the winds velocity relative to earth? Problem 32: The rectangular body A with mass 25 A m = kg is pinned at point O and supported by block B , as indicated in the diagram. Meanwhile, block B with mass 12 B m = kg is initially at rest on a horizontal surface in the position shown, when a constant horizontal force 350 P = N is applied. Determine the speed of block B after it has traveled 2 m from its initial position. Assume that the center of gravity of body A is at its geometric center and that the kinetic coefficient of friction 0.35 k = between the sliding surfaces. Let L = 5 m and H = 1 m. Problem 32 (continued) Problem 33: An automobile, weighing 8kN, travels at a constant speed on a circular, banked track having a radius R = 75m. The bank angle is 6 = o from the horizontal, as illustrated in the diagram. The coefficients of static and kinetic friction between the tires and the track are 0.75 s = and 0.45 k = , respectively. (a) Determine the maximum possible speed of this automobile, (b) the maximum possible speed if = . I~b...
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This note was uploaded on 04/03/2008 for the course EAS 208 taught by Professor Mehdiahmadizadeh during the Spring '08 term at SUNY Buffalo.
 Spring '08
 MehdiAhmadizadeh

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