A beam of mass 100.0 kg and length 4.56789 m is supported by a
cable as shown below. There is a mass,
M = 20.00 kg, hanging from the beam at one end. The beam is at
rest. Calculate the tension in the cable.
Homework Answers
Taking moment about pivot point,
Mg(l cos25) + mg(0.5 l cos25) - T(l sin25) = 0
T = g cos25(M + m/2)/ sin25
T = (9.8 cos25) [20 + 100/2]/sin(25) = 1471.13 N
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