Problem 4.157 Part A Determine the equivalent resultant force Consider the beam

Question

Problem 4.157 Part A Determine the equivalent resultant force Consider the beam shown in (Figure 1. Suppose that d=3.5 m Express your answer to three significant figures and include the appropriate units. Enter positive value if the force is upward and negative value if the force is downward FR= -12.5 kN Submit My Answers Give Up Figure 1 of 1 Correct W' Part B Determine the equivalent couple moment at point O Express your answer to three significant figures and include the appropriate units. Enter positive value if the moment is counterclockwise and negative value if the moment is clockwise Me lo Value kN RO-

Explanation / Answer

you need the area, that is the integral w=(1/3)x^3 from 0 to 3.5 = w= (1/3)(1/4)x^4=(1/3)(1/4)(3.5^4 )= 12.5 kN

the moment is in (1/3)d from O that is: 12.5x(1/3)(3.5) = 14.58 kNm

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