## Problem 511 | Friction

Problem 511
Find the least value of P required to cause the system of blocks shown in Fig. P-511 to have impending motion to the left. The coefficient of friction under each block is 0.20. Problem 510 | Friction Jhun Vert Sun, 04/19/2020 - 08:28 pm

Problem 510
What weight W is necessary to start the system of blocks shown in Fig. P-510 moving to the right? The coefficient of friction is 0.10 and the pulleys are assumed to be frictionless. Problem 509 | Friction Jhun Vert Sun, 04/19/2020 - 08:14 pm

Problem 509
The blocks shown in Fig. P-509 are connected by flexible, inextensible cords passing over frictionless pulleys. At A the coefficients of friction are μs = 0.30 and μk = 0.20 while at B they are μs = 0.40 and μk = 0.30. Compute the magnitude and direction of the friction force acting on each block. ## Problem 454 - System of Booms and Pulleys

Problem 454
Determine the horizontal and vertical components of the hinge force at A for the structure shown in Figure P-454. Neglect the weights of the members and of the pulleys. Problem 453 - Analysis of A-frame with Weightless Cylinder Jhun Vert Sun, 04/19/2020 - 07:53 pm

Problem 453
For the frame shown in Figure P-453, determine the resultant hinge forces at B, C, and E. ## Problem 452 - Weight Supported by a Cable Which Runs Over a Frictionless Pulley

Problem 452
For the frame shown in Figure P-452, determine the horizontal and vertical components of the hinge force at B as it acts upon member AC. ## Problem 340 - 341 | Equilibrium of Parallel Force System

Problem 340
For the system of pulleys shown in Fig. P-340, determine the ratio of W to P to maintain equilibrium. Neglect axle friction and the weights of the pulleys. Problem 319 | Equilibrium of Concurrent Force System Jhun Vert Sun, 04/19/2020 - 10:07 am

Problem 319
Cords are loop around a small spacer separating two cylinders each weighing 400 lb and pass, as shown in Fig. P-319 over a frictionless pulleys to weights of 200 lb and 400 lb . 