The downward forces represent the weights of machinery on the beam shown in (Fig
ID: 1299908 • Letter: T
Question
The downward forces represent the weights of machinery on the beam shown in (Figure 1) . Assume the beam is uniform and has a mass of 330kg .
1.Calculate
FA for the beam.
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.
2.Calculate
FB for the beam.
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.
The downward forces represent the weights of machinery on the beam shown in (Figure 1) . Assume the beam is uniform and has a mass of 330kg . 1.Calculate FA for the beam. 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. 2.Calculate FB for the beam. 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.Explanation / Answer
net torque is zero......
(3100*0)+(4300*4)-(FA*6)-(2200*3)+(FB*4) = 0....
6*FA-(4*FB) = 10600.........(1)
3*FA-(2*FB) = 5300.......(1)
net force = 0.....
Fa+FB-4300-3100-2200 = 0...
FA+FB = 9600....(2)....
FB = 9600-FA....
3*FA-(2*(9600-FA)) = 5300.....
5*FA-(2*9600) = 5300...
5*FA = 5300+(2*9600) = 24500...
FA = 24500/5 = 4900 N...
2) FB = 9600-4900 = 4700 N
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