Car at 60 degree inclination without slipping

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Discussion Overview

The discussion revolves around the feasibility of a mechanical automobile model descending a path inclined at 62 degrees without slipping. Participants explore various aspects, including the necessary coefficient of friction, material choices, wheel design, and weight considerations. The context includes theoretical modeling and experimental observations.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested
  • Experimental/applied

Main Points Raised

  • One participant questions whether a mechanical model can move down a 62-degree incline without slipping, asking for comments on its feasibility.
  • Another participant suggests that the problem may be a disguised homework question and prompts for any calculations the original poster may have done.
  • A participant expresses doubt about the possibility of such a model, citing that the required coefficient of friction (approximately 1.588) exceeds that of plywood (0.15 to 0.20) and references experiments with toy cars that slip or collide at lower inclines.
  • One participant discusses energy change calculations but notes that mass does not seem independent in their results, indicating a complexity in determining the model's mass.
  • Another participant asks about constraints and suggests that modifications to the problem might make it feasible.
  • A later reply mentions a video of an Audi Quattro successfully climbing a 60-degree incline on ice, suggesting that extreme conditions may allow for such feats.

Areas of Agreement / Disagreement

Participants express differing views on the feasibility of the model, with some doubting its possibility due to friction constraints while others suggest potential modifications or reference extreme examples. No consensus is reached on whether the model can successfully descend the incline without slipping.

Contextual Notes

Participants highlight limitations related to the high inclination angle and the required coefficient of friction, as well as the dependency of results on experimental conditions and model design.

Who May Find This Useful

Individuals interested in mechanical modeling, physics of motion on inclines, material science, and experimental design may find this discussion relevant.

shine
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I have doubt wheather a mechanical automobile model can move down from a path having inclination 62 without slipping (height =2meter,car dimensions=10*10*10cm3).
pls give comment wheather it is possible or not
if yes:-
1)how
2)which material could have coeffiecient of friction =1.588 over plywood which have coefficient of friction=0.15-0.20.
3)which wheel be best suited?
4)what should be range of weight.:rolleyes:
 
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Is this a homework question? It sounds like one in disguise! Why do you have doubt; have you done any calculations? Please post your thoughts.
 
doubt...

i read this problem statement as model designing problem,but it seems impossible because:-
1)inclination is too high and for such high inclination coefficient of friction required is tan60 (nearly1.588),whereas plywood has coefficient of friction 0.15 to 0.20.
2)normal toy cars are slipping or getting collision at lower surface(floor below plywood) at such inclination ,I've done experiment with 8 different types of models.(size was even less than mentioned).
I need comment over 1)the possibility of such model
2)if yes which types of tyres will be suited best.







cristo said:
Is this a homework question? It sounds like one in disguise! Why do you have doubt; have you done any calculations? Please post your thoughts.
 
The calculations I've done are about the energy change ,but as role of mass get obviated in equation ,It is not possible to get the value of mass of model .
mg*200=0.5m*v^2
g*200=0.5v^2
but it doesn't seems independent of mass as results of experiment showed(8models).
post comment



shine said:
i read this problem statement as model designing problem,but it seems impossible because:-
1)inclination is too high and for such high inclination coefficient of friction required is tan60 (nearly1.588),whereas plywood has coefficient of friction 0.15 to 0.20.
2)normal toy cars are slipping or getting collision at lower surface(floor below plywood) at such inclination ,I've done experiment with 8 different types of models.(size was even less than mentioned).
I need comment over 1)the possibility of such model
2)if yes which types of tyres will be suited best.
 
What are the constraints on doing this?
Some modifications to the problem might allw you to do it.
 
First:

Like NoTime requested, What can and What cannot you change?
 
There is a video of an Audie Quattro climbing a 60 degree ski jump in germany. It is on ice. It was not assisted. Try you tube or google video to see it. It is wild.
 

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