The block of weight W2 is being held in its position by two cylindrical rollers resting on inclined surfaces. All contact surfaces have a coefficient of static friction, us = 0.36. a. What maximum value of W2 it can be before slipping of the block happens? b. Determine the normal force reaction against the inclined surfaces. W or W1 (in kN) = 516

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System of Forces

A force is an external influence or agent that changes the state of a system. According to Newton's second law, the force applied to a body is proportional to the change in momentum of a body. Hence, whenever a force is applied to a body, its momentum changes. If the body is at rest, under the action of force, its state of rest changes to motion. In other words, the magnitude of the momentum of the body changes from zero to a measurable value. Similarly, if the body possesses some initial velocity, it has some associated momentum, the effect of force can cause the body to halt or come to rest, that is, the momentum reduces to zero.