Problem 9.10 Part A The mass of the uniform cantilever shown in (Figure 1) is 12

Question

Problem 9.10 Part A The mass of the uniform cantilever shown in (Figure 1) is 1200 kg Determine the force on the beam at A Express your answer to two significant figures and include the appropriate units. Enter positive value if the force is upward and negative value if the force is downward. ValueUnits Units Submit My Answers Give Up Part B Determine the force on the beam at B Express your answer to two significant figures and include the appropriate units. Enter positive value if the force is upward and negative value if the force is downward. = 1 Value II Units Submit My Answers Give Up Feedba Continue Figure 1 of 1 20.0 m 30.0 m ng

Explanation / Answer

Sum of the forces at A, where counterclockwise rotation is positive:

0 = Fb*20 m - (1200 kg * 9.81 m/s^2) * 25 m

Fb = 14715 N

Now, sum up the forces in the y direction:

0 = Fa + 14715 N + Fb - (1200 kg * 9.81 m/s^2)

Fa = -2943 N, i.e. Fa is really pointing in the opposite direction of how it's shown in the diagram

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