Speed when swinging from a rope?

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Homework Help Overview

The discussion revolves around a physics problem involving a swinging motion, specifically analyzing the speed of an object (Tarzan) at the bottom of a swing from a given height and angle. The subject area includes concepts of energy conservation and trigonometry.

Discussion Character

  • Exploratory, Conceptual clarification, Mathematical reasoning, Assumption checking

Approaches and Questions Raised

  • Participants discuss the conservation of energy principle, equating potential energy at the top of the swing to kinetic energy at the bottom. Questions arise regarding the role of the angle in determining height and how to apply trigonometric functions to find this height.

Discussion Status

Some participants have offered guidance on using energy conservation principles, while others are exploring how the angle affects the calculations, particularly in relation to height. Multiple interpretations of the angle's relevance are being discussed.

Contextual Notes

Participants are working under the constraints of a homework assignment, which may limit the information they can use or the methods they can apply. There is an emphasis on understanding the relationship between potential and kinetic energy in the context of swinging motion.

Bigdane
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Tarzan swings on a 23.8 m long vine initially inclined at an angle of 36° from the vertical.

(a) What is his speed at the bottom of the swing if he starts from rest?
m/s

(b) What is his speed at the bottom of the swing if he starts with an initial speed of 2.22 m/s?
m/s

help please!
i have no idea how to do this ah!
 
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A)1/2 mv^2 = mgh
potential energy at the top = kinetic energy at the bottom of the pendulum.

B)1/2mv^2 + mgh = 1/2 mv^2
initial kinetic energy plus potential energy at the top = final kinetic energy at the bottom.
 
how do i factor in the angle?
 
the angle has nothing to do with the energy, only in finding the height.
 
how do i use it to find the height?
 
really basic trig.
 

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