3 The unbalanced wheel A weighs 644 lb and has a radius of g

3) The unbalanced wheel A weighs 64.4 lb and has a radius of gyration of mass relative to the horizontal axis of rotation through O of 0.40ft. The block B weighs 48.3 lb and is fastened to A by an inextensible cord which passes over the smooth massless drum at D and is wrapped around A. The moment of the couple M applied to A is 20ft-lb counterclockwise. When A is in the position indicated, it has an angular velocity of 6.0 rad/s clockwise. Find: a) the angular acceleration of A, b) the reactions at pin O. Neglect bearing friction at O. Box in your answers 12in Go

Solution

= d/dt

=4.5 rad/sec

reactions at pin O