How Do I Solve This Dynamics Mechanics Equation?

Click For Summary

Discussion Overview

The discussion revolves around a dynamics mechanics problem related to the work-energy equation. Participants seek assistance in solving the problem and explore various approaches and interpretations of the concepts involved.

Discussion Character

  • Homework-related
  • Exploratory
  • Technical explanation

Main Points Raised

  • Some participants express difficulty in solving the problem and request help, indicating they have tried various methods without success.
  • One participant questions what approaches have been attempted and suggests considering the relevance of the work-energy section to the problem.
  • Another participant mentions that the problem involves the work-energy equation and refers to an answer provided by a teacher.
  • There is a discussion about the relationship between work and energy, with a participant asking how it applies to the problem scenario involving a train car moving up a grade.
  • One participant presents an equation related to the problem but requests clarification on the terms used in that equation.
  • Another participant expresses doubt about the correctness of the posted answer, suggesting it may contain a typo.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the solution to the problem, and multiple viewpoints regarding the approaches and interpretations of the work-energy equation are presented.

Contextual Notes

Some participants mention specific equations and terms without providing definitions, leading to potential ambiguity in understanding the problem. There are also indications of uncertainty regarding the correctness of the provided answer.

darkmagic
Messages
164
Reaction score
0

Homework Statement



Can someone teach me on how to solve this problem? This is a dynamics mechanics problem. I tried everything I know but I cannot really get the answer. Please help ASAP.

Homework Equations





The Attempt at a Solution

 

Attachments

  • problem.JPG
    problem.JPG
    9.3 KB · Views: 446
Physics news on Phys.org
Please someone explain to me...
 
darkmagic said:

Homework Statement



Can someone teach me on how to solve this problem? This is a dynamics mechanics problem. I tried everything I know but I cannot really get the answer. Please help ASAP.

Homework Equations





The Attempt at a Solution


When you say that you've tried everything that you know, what have you tried? What approaches? Why do you think that the section that this problem is from is titled "Work and Energy"?

BTW, I get a different answer than is shown. Are you sure about those numbers?
 
it involves the work-energy equation. the answer is from my teacher.
 
darkmagic said:
it involves the work-energy equation. the answer is from my teacher.

So what can you tell us about the relationship between work and energy? How do you think it applies to this problem?

If I understand the problem statement, a train car or whaver coasts up a grade with some initial velocity, and they want to know what the final backward velocity will be after it goes up, stops, and accelerates back down the grade. What kind of energy equations would you use to approach this?
 
the equation that involves in that problem is summation of XS=1/2 W/g [v2 - vo2]
 
darkmagic said:
the equation that involves in that problem is summation of XS=1/2 W/g [v2 - vo2]

Sorry, you're going to have to define the terms in that equation for me. And in defining the terms in your own words, you might just talk yourself to the solution of the problem...

Well, except that I still think the posted answer has a typo in it...
 

Similar threads

Engineering Understanding the dynamic load factor (DLF)
  • · Replies 1 ·
Replies
1
Views
3K
Engineering Dynamic physical model - automobile wheel suspension confusion
  • · Replies 7 ·
Replies
7
Views
2K
Engineering Kinematic modelling of a mechanism (General Crank)
  • · Replies 9 ·
Replies
9
Views
2K
Beam boundary condition problem
  • · Replies 12 ·
Replies
12
Views
3K
Comp Sci Solve ax+by=GCD(a,b) for RSA Algorithm Cryptography
  • · Replies 2 ·
Replies
2
Views
2K
Advanced Hydrodynamic Problem - University level
  • · Replies 49 ·
2
Replies
49
Views
5K
What are the Benefits of Using Modal Coordinates in Structural Dynamics?
  • · Replies 1 ·
Replies
1
Views
8K
How to approach dynamics problems?
  • · Replies 8 ·
Replies
8
Views
2K
Mechanics of Materials — Torsional Stress on a Spinning Shaft
  • · Replies 5 ·
Replies
5
Views
4K
Engineering Solve LC Circuit Problem: Examples & Resources
  • · Replies 10 ·
Replies
10
Views
2K