Question

PLANE KINETICS OF RIGID BODIES 512 16/191 The uniform circular disk D weighs 8 lb and is free to turn about the bearing axis C-C. The arm B weighs 5 lb and is fastened to the vertical shaft O-O. The arm may be approximated bar 12 in. long, and the moment of inertia of the vertical shaft O-O may be neglected. The rod A weighs 6 lb and is fastened securely to the arm. If the initial angular velocity of D is wo rad/sec in the direction shown and the arm B is at rest, determine the angular velocity o of the arm after a torque M = 15 lb-in. has been applied to the shaft for 4 sec. slender as a 7 = 41.1 rad/sec Ans. B 6" C 6" B -5" A D C Problem 6/191

Answer 1

SOLUTI N' Wo7 Rad/ Ma15 lb We fnow Het TOAMe zId (T) the mowent Tarqn abrut tu 0-0, T- M Isb- In the total otahonl nuha of aim wil cut u wutteu (sx0.03)(122 (E0-021)x 2 2 4 (-8G 64 2.534 Jdut 2- 2 11.64 theu Tarm aanm tTdint hdiot 0-0m 4 1.4/-wo 4- 2- 3.534 l1.64x7 - 4 4 o41.1 Rad/