How far will a sliding block on an inclined plane move before coming to rest?

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Discussion Overview

The discussion revolves around a physics problem involving a block sliding on an inclined plane, focusing on how far the block will move up the incline before coming to rest after being projected upwards with an initial speed. The scope includes homework-related problem-solving and the application of concepts such as friction and motion on inclines.

Discussion Character

  • Homework-related
  • Technical explanation
  • Debate/contested

Main Points Raised

  • Elizabeth seeks assistance with a physics problem involving a block sliding down and then projected up an inclined plane.
  • One participant suggests calculating frictional forces from a previous part of the problem and assumes that the frictional force is independent of velocity.
  • Another participant provides a calculation for the acceleration and distance the block will travel up the incline, presenting a specific numerical approach.
  • A different participant emphasizes the importance of guiding the original poster to find the answer themselves rather than providing direct solutions, highlighting a policy against doing homework for others.

Areas of Agreement / Disagreement

There is no clear consensus among participants. Some provide direct calculations, while others advocate for a more guided approach to problem-solving, indicating differing views on how to assist the original poster.

Contextual Notes

Participants reference assumptions about friction and the independence of velocity, but these assumptions are not universally accepted or elaborated upon, leaving some aspects of the problem unresolved.

Who May Find This Useful

Students or individuals interested in physics problem-solving, particularly those dealing with inclined planes and friction in mechanics.

ElizabethEmily
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Please Help, I've asked two physics majors for help now and they can't tell me can anyone be of assistance?


A block with a mass m=16.5 slides down an inclined plane with a slope angle of 32.7 degress with a constant velocity. It is then projected up the same plane with an initial speed of 4.25 m/s. How far up the incline will the block move before coming to rest?

Thanks,
Elizabeth
 
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Apparently one is suposed to calculate frictional forces from part 1 of the problem, then apply the result to part 2. One is presumably supposed to assume that the frictional force is independent of velocity, see "kinetic friction" in the link below.

The rest of the problem is pretty bog-standard, I'm not sure where you are stuck.

http://hyperphysics.phy-astr.gsu.edu/hbase/frict2.html
 
from 1st part
uMg cos 32.7= Mgsin 32.7
so
u=tan 32.7=0.642
now for 2nd part
a=-(o.642 cos 32.7+sin 32.7)g
=1.08g
s=v square/2a=(4.25)sq./1.08g
This was a pretty simple one
 
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shashank, the general policy is to help the person find the answer through hints or suggestions. Please try and stick to this.

Solving the problem for them, doesn't help in any way. See pervect's post. If the poster is experiencing difficulty with some part, she (or he) may get that cleared up, by stating specifically where the difficulty is.

Doing other people's homework for them is not only unfair, but also counterproductive.
 

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