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Unformatted text preview: Problem 3. A slender 6kg rod can rotate in a vertical plane about a pivot at B. A spring of constant k=600 N/m and an unstretched length of 225 mm is attached to the rod as shown. Knowing that the rod is released from rest in the position shown, determine its angular velocity after it has rotated through 90°. Problem 4. A halfcylinder of mass m and radius r is released from rest in the position shown. Knowing that the halfcylinder rolls without sliding, determine: a) its angular velocity after it has rolled through 90°. b) the reaction at the horizontal surface at the same instant [Hint: Note that GO = 4 r /3 π and that, by the parallelaxis theorem, Ī = ½ mr 2 – m (GO) 2 .] Problem 5. The motion of the uniform slender 2.4kg rod AB is guided at A and C by collars of negligible mass. The system is released from rest in the position θ =30°. Knowing that the magnitude of the force P applied to collar A is 10 N, determine the angular velocity of rod AB when θ = 45°....
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This note was uploaded on 04/23/2008 for the course BENG 109 taught by Professor Ping during the Winter '06 term at UCSD.
 Winter '06
 Ping

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