How to Calculate Work and Power in a Mass Spring System

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Homework Help Overview

The discussion revolves around calculating work and power in a mass-spring system, specifically focusing on a block compressing a spring and the subsequent motion influenced by friction.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • Participants discuss the setup of the problem, including the spring constant and friction coefficients. There are inquiries about the work done by the spring and friction, as well as the power dissipated by friction. Some participants express frustration with their attempts and seek guidance on their approach.

Discussion Status

There is an ongoing exploration of the problem, with participants sharing their struggles and seeking help. Suggestions have been made to consider fundamental equations like F = m*a as a starting point for analysis.

Contextual Notes

Participants mention working through multiple attempts and express uncertainty about their progress. There is a focus on the need for clarity in their calculations and reasoning.

Harshmau5
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Homework Statement



consider a mass spring system mounted on a horizontal surface. The left end of the spring is rigidly mounted, and the spring constant is 27 N/m. A block with a mass of 7 kg is placed on the right side of the spring and compresses the spring a distance of .15 m. The region on the horizontal surface under the spring from the barrier on the left side to the equilibrium length of the spring is frictionless. The region of the horizontalsurface to the right of the equilibrium length of the spring has a coefficient of kinetic friction equal to .55.
A. How far does the block slide before it stops?
B. How much work is done on the block by the spring? How much work is done on the block by friction?
C. What is the power dissipated by friction?

Homework Equations


Conservation of energy
Work

The Attempt at a Solution

 
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So, where is your work?
 
I have about two pages of work.. Too much to post..
 
I've tried so many different things I'm just going in circles.. I've been working on this the past two days..
 
Note that problems or attempted solutions should not be posted as image attachments or links.
This what I have after restartingrestarting
 

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I could really use any help..
 
Dr.D said:
So, where is your work?

How would you approach it?
 
Have you thought about writing F = m*a? That's a good place to start.
 

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