The block A and the wedge B weighs 100 kN and 40 kN, respectively. The coefficient of friction for all contacting surfaces is u = 0.268. Determine the following: ider the b. What value of P in kN would be required to pull to the left the wedge under the block? Assume the block A is still in contact with the wall just as motion starts. Wall A P for part a P for part b 20°

k=2 lb/ft -¨¨¨¨¨ B Two blocks A and B have a weight of 11 lb and 6 lb, respectively. They are resting on the incline for which the coefficients of static friction are μA = 0.16 and μB = 0.23. Determine the angle 0 which will cause motion of one of the blocks. What is the friction force under each of the blocks when this occurs? The spring has a stiffness of k = 2 lb/ft and is originally unstretched. Determine the smallest angle which will cause motion of one of the blocks. Determine is the friction force under the block A at this angle. Determine is the friction force under the block Bat this angle.

1. The two homogeneous bars AB and BC are connected with a pin at B and placed between rough vertical walls. If the coefficient of static friction between each bar and the wall is 0.4, determine the largest angle 0 for which the assembly will remain at rest. 20 in. 6 lb 8 lb 20 in.

Take A = 150 mm^2 and E = 200 GPa