Angular distance question - how to solve

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Homework Help Overview

The discussion revolves around calculating the total angular distance undergone at the knee during a series of squats, specifically focusing on the transition from 180 degrees to 95 degrees over 10 repetitions. The problem involves concepts from angular motion and may require understanding of both directional movement and total distance calculation.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • Participants explore different methods of calculating angular distance, including whether to consider directionality and how to interpret the results based on the provided answer key. Questions arise about the necessity of calculating both directions and the implications of doing so.

Discussion Status

There is an ongoing exploration of the problem with participants sharing their interpretations and calculations. Some have provided their reasoning, while others express uncertainty about the correct approach and the rationale behind calculating distances in both directions. The discussion remains open without a clear consensus.

Contextual Notes

Participants reference an answer key that differs from their calculations, raising questions about potential misunderstandings or missing information regarding the problem setup. There is a mention of homework rules that may influence how the problem is approached.

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during knee flexion of a squat phase the knee moves from 180 degrees to 95 degrees. if you perform 10 complete squats what is the total angular distance (in radians and in degrees), undergone at the knee?

anyone know how to solve this one? can you explain
 
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If I understood it correctly:
-If you pay regard to the sign, then 0deg and 0rad.
-If you only count one direction, then 10*(180-95)=850deg=14,84 rad.
 
Replusz said:
If I understood it correctly:
-If you pay regard to the sign, then 0deg and 0rad.
-If you only count one direction, then 10*(180-95)=850deg=14,84 rad.

that is the answer i got, but the answer key has 1700 degrees for total distance and 29.67 rad. so i was not sure if i was missing something here.
 
pennywise1234 said:
that is the answer i got, but the answer key has 1700 degrees for total distance and 29.67 rad. so i was not sure if i was missing something here.

here is the sheet if you want to look it
 

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Then they calculated both directions, without looking at the signs. Yes, this is indeed the third possibility :)
 
but why calculate both directions? so in essence, it is 850 x 2 = 1700. Do you know when you have to calculate both directions?
 
I don’t know… really… I only know the physics part… Probably if you want to calculate how much your knee was ‘used’
 
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pennywise1234 said:
but why calculate both directions? so in essence, it is 850 x 2 = 1700. Do you know when you have to calculate both directions?
This is the angular analog of linear distance.

If you walk 1 mile to the store and then back home every day for a week, what is the total distance you walk?

You count the distance both there and back, and then add those for 7 days.
 

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