Solving Wedge-like Problem with Physics

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Homework Help Overview

The discussion revolves around a physics problem involving a block being moved by a cone, with considerations of friction and force calculations. The original poster describes their understanding of the forces at play and seeks clarification on the appropriate approach to determine the force needed to move the block.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • The original poster attempts to project the forces acting on the cone and block system but expresses uncertainty about whether to project forces along the cone's side or its normal surface. Some participants question the completeness of the original poster's approach, particularly regarding the friction between the cone and the block.

Discussion Status

The discussion is ongoing, with participants exploring different interpretations of the problem. The original poster has acknowledged a potential oversight regarding friction, indicating a willingness to refine their understanding. No consensus has been reached yet.

Contextual Notes

The original poster mentions being out of practice in mechanics, which may affect their approach to the problem. There is also a reference to a visual aid (a picture) that may provide additional context, though it is not included in the discussion.

EugeneZ
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Hey, guys! Not really my homework question, I am long past my days of studying physics (I stumbled upon this problem doing some engineering researches) but still i put it here cause it should be rather easy. Here is the picture I made:
http://img248.imageshack.us/img248/7700/riddlew.png

Basically, I've got a block of a known mass, I know friction factor and contacting area, thus I am able to calculate Friction force being exerted upon moving this block. Block is being moved by a cone. I need to know a formula for a Force needed to be applied to a cone to move the block. Thank you very much!

P.S. As for my own efforts of solving, it comes down to this: I realize I have to project and equate projection of cone force to friction force but here it got a bit tricky for me. I'm very rusty in mechanics and I'm not really sure if i should project forces in this system on the side of the cone or on the surface normal of the cone side.
 
Last edited by a moderator:
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Maybe I posted in the wrong forum?
 
C'mon guys
 
Well, I am not going to let it go that easy.
F=Ffriction*tan(alpha) or F=friction factor*block's mass*tan(alpha). Am I correct?

P.S. Oh gosh i just realized i totally missed friction between cone and block. :( Guys, I really need your help! Thank you in advance.
 
Last edited:

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