I Review Consider the truss shown in (Figure 1). Suppose that F = 10 kN Part A Determine the force in member HI of the truss, and state if the member is in tension or compression. Express your answer to three significant figures and include the appropriate units. Enter negative value in the case of compression and positive value in the case of tension. ? FHI = Value Units Submit Request Answer Part B Determine the force in member FI of the truss, and state if the member is in tension or compression. Express your answer to three significant figures and include the appropriate units. Enter negative value in the case of compression and positive value in the case of tension. Figure < 1 of 1> FF1 = Value Units Submit Request Answer -2 m+2 m+2 m--2 m-2 m+2 m- Part C 4 kN SKN 6 kN F Determine the force in member EF of the truss, and state if the member is in tension or compression. Evpress vour aneuer to three sianificant figures and include the appropriate unite Enter negative valu

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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.