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Unformatted text preview: A bridge 21m long has a mass 66700 kg and is supported at each end. A truck of mass 35000 kg is located 11 m from the left end. Acceleration of gravity is 9.8 m/s2. (a) What is the force on the bridge at the point of support? A fishing reel has inertia of .00068 kgm2 and radius of 5.3 cm. A friction clutch exerts restraining torque of 1.41 Nm. A fish bites and the reel begins to spin with an angular acceleration of 65 rad/s2. (a) What force does the fish exert on the line? (b) How much line unwinds in .51sec? A man applies a force of 300N at an angle of 60* to the door, 2m from the hinges. (a) Find the torque on the door. (b)Suppose a wedge is placed 1.50m from the hingescalculate the force of the wedge on the door. A child of 51 Kg sits on the edge of a merry go round with radius 2.2 m and inertia of 212.282 kgm2. Angular velocity is 2.4 rad/s. (a) what radial force does the child exert to stay on? (b) What is the angular velocity if the child walks toward the center and stops .88m away?force does the child exert to stay on?...
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