How Do You Calculate the Tension in a Rope with a Person Midway Across?

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SUMMARY

The problem involves calculating the tension in a rope when a person, Arlene, is midway across a high wire strung between two buildings, with a distance of 10.0 meters between them and a sag of 10.0 meters. Given Arlene's mass of 47.0 kg, the correct approach to find the tension involves using the equilibrium of forces, specifically the equations Tension = ma and F = ma. By summing the vertical forces to solve for the vertical component of tension and then using the angle of the rope, one can determine the total tension in the rope.

PREREQUISITES
  • Understanding of Newton's laws of motion, specifically F = ma
  • Basic knowledge of trigonometry to resolve tension into components
  • Familiarity with concepts of equilibrium in physics
  • Ability to calculate resultant forces from vector components
NEXT STEPS
  • Study how to resolve forces into components using trigonometric functions
  • Learn about static equilibrium and how to apply it to problems involving tension
  • Explore the concept of resultant forces and how to calculate them
  • Investigate real-world applications of tension in cables and ropes in engineering
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Students studying physics, particularly those focusing on mechanics, as well as educators looking for examples of tension calculations in real-world scenarios.

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Homework Statement



Arlene is to walk across a "high wire" strung horizontally between two buildings 10.0 apart. The sag in the rope when she is at the midpoint is 10.0 , as shown in the figure .

If her mass is 47.0 , what is the tension in the rope at this point?


Homework Equations


Tension=ma



The Attempt at a Solution


I know that the mass is 47 kg but I don't know how to find the acceleration or if I am even using the correct formula. Please help
 
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F=ma is the correct formula to use but there is no acceleration present so the right hand side is zero. The left hand side is the sum of the forces on the person (tension and weight). Thus the sum of the forces in the vertical and horizontal directions must equal zero. Start by summing forces in the vertical which will allow you to solve for your "y" component of tension. Then use the given angle of the rope to calculate the "x" component of tension. Then its just determine the resultant total tension.
 

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