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MMAN2300
Kinetics of rigid
This weekly problem set contains 2 questions. Students are required to submit handwritten working in PDF. WHP04-Q1 The uniform 50-kg bar is held in the equilibrium position by cords AC and BD. Determine the tension in BD and the angular acceleration of the bar immediately after AC is cut. Answer: (a) α = 4.905 rad/s2; (b) TB = 122.625 N Homework Problems WHP04 – Page 2 of 5Homework Problems WHP04 – Page 3 of 5 WHP04-Q2 The spring is uncompressed when the uniform slender bar AB is in the vertical position shown. Bar AB with a mass of 50 kg and a length of 1 m is released from rest in the position where the bar has been rotated 30° clockwise from the position shown. This initial position of the bar AB is illustrated using the dashed line in the figure. Neglect any sag of the spring as well as the spring mass. (a) Determine the initial angular acceleration of the bar when it is just released from rest. (b) Find the angular velocity of the bar when it reaches the vertical position. Answers: (a) α = 198.951 rad/s2 (b) ω2 = 10 rad/sInitial position of the bar AB when it is released from rest k = 12 kN/m 30°