Swinging on a Vine? - Calculate Tension with Physics

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Homework Help Overview

The problem involves calculating the tension in a vine as Tarzan swings through the bottom of an arc, given specific parameters such as the length of the vine and Tarzan's mass and speed. The subject area pertains to dynamics and forces in circular motion.

Discussion Character

  • Exploratory, Conceptual clarification, Mathematical reasoning

Approaches and Questions Raised

  • Participants discuss the forces acting on Tarzan at the bottom of the swing, including tension and gravity. One participant questions the necessity of using the angular momentum principle and seeks alternative methods for solving the problem.

Discussion Status

The discussion includes attempts to clarify the forces involved, with one participant providing a hint about drawing a diagram. Another participant initially expresses confusion about determining the tension force but later indicates they resolved their question by recalling the concept of centripetal force.

Contextual Notes

Participants are working within the constraints of a homework assignment, which may limit the methods they can use or the information they can assume.

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swinging on a vine??

Homework Statement



Consider the example of Tarzan swinging on a vine. Let the length be L = 10 m, and Tarzan
has a mass of M = 70 kg. The figure shows him swinging through the bottom of the arc,
where at that instant he has a speed of 13.0 m/s. What is the tension in the vine?

A. 686 N
B. 823 N
C. 1869 N
D. 1153 N
E. 1335 N


The Attempt at a Solution



is there an easier way to solve this instead of using the angular momentum principle?? if so how??
 

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Draw a diagram listing all the forces.
hint there are two forces down at the bottom of the arc)
 


mgb_phys said:
Draw a diagram listing all the forces.
hint there are two forces down at the bottom of the arc)


i know there is the F(tension) which points up. and the F(gravity) pointing down.
F(gravity) = -mg
but how do you know the F(tension)
 


never mind i got it. forgot centripetal force :)
thanks
 

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