3) A 5-degree angle wedge is Used to move the mass of 27 kg upwards along the inclined floor. The static friction coefficient between the wedge and the contact surface is 0.40, and the static friction coefficient between mass and the floor is equal to 0.20. Find the smallest force P that can move such masses. P 5° 27 kg 20°

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Q: 7.7

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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.