he 15-lb bar BC is connected to a disk centered at A, and to a bar DC. If the disk is made to rotate at a constant speed of 180 rpm, determine the vertical components of the force exerted on bar BC at B and at C.

Solve

1.0m 3.0m 0.5m mi m2 PA N, 5. The drawing above shows two objects on a board supported at two locations. The m; = 40 kg (centered over P), m;=20 kg and m3=10 kg. c. Determine the force exerted by N2. (Take torques around P.) d. m2 rolls to the right. Just before the board starts to tip everything is balanced on N2 with no force on N1. Determine how far to the right of N2 m2 could roll without the board tipping. You might find it easier to take torques around a point rather than P.

With the 360-lb cylindrical part Pin its grip, the robotic arm pivots about O through the range -45° ≤ 0 ≤ 45° with the angle at A locked at 120%. Determine and plot (as a function of e) the moment at O due to the combined effects of the 360-lb part P, the 100-lb weight of member OA (mass center at G₁), and the 60-lb weight of member AB (mass center at G₂). The end grip is included as a part of member AB. The lengths L₁ and L2 are 2.8 ft and 2.0 ft, respectively. What is the maximum absolute value of Mo and at what value of 0 does this maximum occur? The moment is positive if counterclockwise, negative if clockwise. After you have the plot, answer the questions. A lb-ft lb-ft lb-ft 8 77 5/2 + T G₁ To (M 120⁰ G₂ B 0 Questions: When 0 = -26°, Mo= i When 0 = 6°, Mo= i When 0 = 20°, Mo= i The maximum absolute value Momax = lb-ft at 0= i