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sophiamoser
19.03.2020 •
Mathematics
A 135 kg scaffold is 6.60 m long. It is hanging with two wires, one from each end. A 440 kg box sits 1.70 m from the left end. What is the tension in the left hand side wire?(g = 9.8 m/s2)
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Ответ:
Step-by-step explanation:
mass of scaffold, m = 135 kg
mass of box, m' = 440 kg
let the tension in the left wire is T.
take moments about the right end.
According to the diagram,
135 x g x 3.3 + 440 x g x (6.6 - 1.7) - T x 6.6 = 0
4365.9 + 21128.8 - T x 6.6 = 0
T x 6.6 = 25494.7
T = 3862.8 N
Ответ:
yes, yes, no, yes
Step-by-step explanation:
5×8=40
40 is equal to 40, so yes
5×11=55
55 is greater than 40, so yes
5×4=20
20 is not greater than or equal to 40, so no
5×10=50
50 is greater than 40, so yes