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.
 

Weight of a hanging block

 

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.
 

Two blocks on two inclined planes connected by cords

 

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.
 

453-a-frame-with-cylinder.gif

 

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 .
 

Cords loop around the spacer of cyliders