A clockwise couple M is applied to the circular cylinder as shown. Determine the value of M required to initiate motion for the conditions mg = 4.6 kg, me = 4.7 kg. (u) =0.46, (c= 0.34, and r= 0.21 m. Friction between the cylinder C and the block B is negligible. (c) Answer: M = mc. i M mg (H₂)B N-m

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7. Draw a free body diagram of the crate. Also, answer the multiple choice question.

2-Determine the magnitude ( P) of the B W=30 N horizontal force required to initiate motion of the block of mass (m.) for the cases : a-Pis applied to the right. b-Pis applied to the lift. u=0.5 30° P(a) mg P(b

The uniform 23-kg plate is welded to the vertical shaft, which is supported by bearings A and B. Calculate the magnitude of the force supported by bearing B during application of the 100-N-m couple to the shaft. The cable from C to D prevents the plate and shaft from turning and the weight of the assembly is carried entirely by bearing A. 100 N-m A 250 mm 95 mm 640 mm 240 mm 370 mm Answer: B = 1613 kN eTextbook and Media

The uniform rod BC weighs 32.2 lb. The rod is connected to the frame D by a frictionless pin C and a cord AB as shown. Calculate the maximum value of the applied force P for which rod BC will not “rise up”.

End B of the uniform 2.7-kg bar AB is connected to a small roller that moves in a horizontal slot. The other end of the bar is pinned to the homogeneous 1.8-kg disk that rolls without slipping on the vertical surface. The spring attached to A has a free length of 0.3 m and a stiffness of 58 N/m. After the system is becomes horizontal. Determine the magnitude of the force P that acts on the bar at B. 2.1 m 0.24 m 0.9 m www 1.8 kg 1.5 m 2.7 kg P

The figure below shows a cylinder, which is rotating in clockwise direction. A lever is pushing onto the cylinder, thus exerting a braking torque. The lever itself is loaded by a force FE . a) Draw the free-body diagram of the lever, determine the direction of the kinetic friction force.

Q4.) The 12 kg block A and 10 kg block B are pinned to a rod having negligible mass and resting on horizontal surfaces. A horizontal force P is applied to the rod at end C increasing gradually from zero until motion first begins. a) If the coefficient of static friction between both blocks and each surface is μ = 0.45, determine the value for P at which point motion first begins and describe the motion that occurs in a few brief words. b) If the coefficient of static friction between both blocks and each surface is μ = 0.6, determine the value for P at which point motion first begins and describe the motion that occurs in a few brief words. (Hint: Consider drawing the system as one FBD for this analysis and treat each block as a particle with negligible dimensions) 100 mm 200 mm с Bo 10 kg 25° A 12 kg 12 kg

P1) Three blocks of masses m, = 8 kg, m, = 4 kg and ma = 3 kg are tied to each other as shown in the figure. The coefficient of kinetic friction between the 4 kg block and the surface is 0.5. When the system is released the blocks move. Calculate the acceleration of the blocks and the tensions in the strings.