Chapter 18, Problem 11P

1

A 20kg slender rod AB is pinned to a roller at A that slides freely along the slot as shown in the figure below. The rod is released from the rest at an angle of 30. At the same time, a couple moment of M = 5 N.m in clockwise direction is applied at its centre of gravity. If immediately after the release the acceleration of the roller at A is 43m/s, determine the reaction forces at the pin connection at Point A.

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Your answer is partially correct. The figure shows the cross section of a uniform 174-lb ventilator door hinged about its upper horizontal edge at O. The door is controlled by the spring-loaded cable which passes over the small pulley at A. The spring has a stiffness of 12.7 lb per foot of stretch and is undeformed when = 0. If the door is released from rest in the horizontal position, determine the maximum angular velocity reached by the door and the corresponding angle 0. Answer: Wmax = www 4.2' 0.636 rad/sec at 0 = 58.49 O

Please answer 3.2 only with reference to 3.1

The 29-kg wheel is rolling under the constant moment of M = 85 N·m. The wheel has radius r = 0.57 m, has mass center at point G, and the radius of gyration is kg = 0.25 m. The coefficients of friction between the wheel and the ground is g = 0.37 and μk = 0.16. If the wheel rolls while slipping, determine the magnitude of the linear acceleration of point G (in m/s²). Please pay attention: the numbers may change since they are randomized. Your answer must include 2 places after the decimal point. Take g = 9.81 m/s². M Your Answer: Answer

The crank OA rotates in the vertical plane with a constant clockwise angular velocity ωo of 4.5 rad/s. For the position where OA is horizontal, calculate the force under the light roller B of the 10-kg slender bar AB.

6/40 If the frictional moment at the pivot O is 2 N+m, de- termine the angular acceleration of the grooved drum, which has a mass of 8 kg and a radius of gyra- tion kg = 225 mm. 200 mm kg 12kg

The 10-lb disk P (?o = 0) was placed in contact with the wall at C and with disk Q weighing 8-lb. Disk Q maintains an angular acceleration equal to 2 rad/s2,CCW  and has a couple moment of M= 31 lb-ft, CCW. If the coefficient of kinetic friction at contact surfaces is 0.25, determine the initial angular acceleration of disk P. Also, determine the reactions at points A and B. reminder: Neglect the weight of rod AB CCW- COUNTERCLOCKWISE SHOW FULL SOLUTION!!!!