# Two 8° wedges of negligible weight are used to move and position and block position a 530-Ib block Knowing that the coefficient of static friction is 0.40 at all surfaces of contact, determine the magnitude of the force P for which motion of the block is impending.

Question-AnswerCategory: Engineering MechanicsTwo 8° wedges of negligible weight are used to move and position and block position a 530-Ib block Knowing that the coefficient of static friction is 0.40 at all surfaces of contact, determine the magnitude of the force P for which motion of the block is impending.

Two 8° wedges of negligible weight are used to move and position and block position a 530-Ib block  Knowing that the coefficient of static friction is 0.40 at all surfaces of contact, determine the magnitude of the force P for which motion of the block is impending. Step: 1

Free body diagram for block: Step: 2

Given:
Coefficient of static friction, From equilibrium equations   …… (1)

Step: 3   …… (2)

Step: 4

So, by solving (1) and (2) we get and     Step: 5

Free body diagram for wedge: Step: 6

From equilibrium equation       Step: 7     The magnitude of force is 