Part A The 21-kg roll of paper has a radius of gyration k, = 90 mm about an axis passing through point A. It is pin supported at both ends by two brackets AB. The roll rests against a wall for which the coefficient of kinetic friction is Hk = 0.2. Neglect the mass of paper that is removed. (Figure 1) Determine the magnitude of the constant vertical force F that must be applied to the roll to pull off 1 m of paper in t = 3 s starting from rest Express your answer to three significant figures and include the appropriate units. HẢ ? Value Units F = Submit Request Answer Provide Feedback

The 10 kg slender bar AB, shown in the figure, has a length of 2 m. A blockof negligible mass, pinned freely to end A, is confined to move along the smooth circular groove with its centre at O. End B rests on the floor for which the coefficient of kinetic friction, µk = 0.4. If the bar is released from rest when θ = 30 degreesa) identify the type of ensuing motion of the bar,b) draw the free body, kinematic and kinetic diagrams for the bar, c) set up a global reference axes system, and write down the relevantkinetic and kinematic relationships with respect to reference axes  system, andd) determine the angular acceleration of the bar and the reaction forces at ends A and B.

The homogeneous rectangular plate weighs 37 lb and is supported in the vertical plane by the light parallel links shown. If a couple M = 83 lb-ft is applied to the end of link AB with the system initially at rest, calculate the magnitude of the force supported by the pin at Cas the plate lifts off its support with 8 = 28° 16 Answer: Fc= 24" B D 17" 10, 17" lb M

The double pulley shown has a mass of 15 kg and a centroidal radius of gyration of 160 mm. Cylinder A and block B are attached to cords that are wrapped on the pulleys as shown in the figure. The coefficient of kinetic friction between block B and the surface is 0.2. Consider that the system is at rest in the position shown when a constant force P= 230 N is applied to cylinder A. 150 mm 250 mm 30° 15 kg 5 kg :1 m Determine the velocity of cylinder A as it strikes the ground. (You must provide an answer before moving on to the next part.) 5.5 * m/s The velocity of cylinder A as it strikes the ground is