Question

The 18-lb sphere and 12-lb block (shown in section) are secured to the arm of negligible mass which rotates in the vertical plane about a horizontal axis at O. The 7-lb plug is released from rest at A and falls into the recess in the block when the arm has reached the horizontal position. An instant before engagement, the arm has an angular velocity ω₀ = 2.3 rad/s. Determine the angular velocity ω (positive if counterclockwise, negative if clockwise) of the arm immediately after the plug has wedged itself in the block.

7 lb 20" 卜. 12" 18 lb 0 12 Ib 18"

Answer 1