Answer to Question #117732 in Mechanics | Relativity for Wilcox

Question #117732
A 12.2 m crane weighs 18.0 kN and is lifting a 56.9 kN load. The hoisting cable (tension T1) passes
over a pulley at the top of the crane and attaches to an electric winch in the cab. The pendant cable
(tension T2) which supports the crane, is fixed to the top of the crane. Find the tensions in the two cables.

T1 = Blank 1. Calculate the answer by read surrounding text.

T2 = Blank 2. Calculate the answer by read surrounding text.

Expert's answer
"T_1=W_2=56.9\\ kN"

"T_2\\cos{35}(L\\cos{40} )+ T_1\\cos{45}(L\\cos{40}) - T_2\\sin{35}(L\\sin{40} )-\\\\- T_1\\sin{45}(L\\sin{40}) - W_2(0.5L\\sin{40}) - T_1(L\\sin{40})=0"

"T_2\\cos{35}\\cos{40} + T_1\\cos{45}\\cos{40} - T_2\\sin{35}\\sin{40} \\\\- T_1\\sin{45}\\sin{40} - 0.5W_2\\sin{40} - T_1\\sin{40}=0"

"T_2\\cos{35}\\cos{40} + 56.9\\cos{45}\\cos{40} - T_2\\sin{35}\\sin{40} \\\\-56.9\\sin{45}\\sin{40} - 9\\sin{40} - 56.9\\sin{40}=0"

"T_2=144.5\\ kN"

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Assignment Expert
26.05.20, 19:42

Dear visitor, please use panel for submitting new questions

Wilcox Muchineripi
25.05.20, 18:35

What is the angular momentum of a figure skater spinning at 3.0 rev/s with arms in close to her body, assuming her to be a uniform cylinder with a height of 1.5 m, a radius of 15 cm, and a mass of 48 kg ? How much torque is required to slow her to a stop in 4.0 s, assuming she does not move her arms?

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