Friction, Spring Constant, Energy

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SUMMARY

The discussion focuses on solving a physics problem involving friction, spring constant, and energy calculations. The key equations referenced include W = -um2gh and m1gh = 0.5Kh^2 - um2gh. The user attempts to manipulate these equations to find the final work equation, W = um2g*(2g(m1+um2)/K), and seeks assistance in verifying their calculations. The final numerical result presented is approximately 133.1754667, indicating a potential error in the manipulation of the equations.

PREREQUISITES
  • Understanding of classical mechanics principles, specifically energy conservation.
  • Familiarity with spring mechanics and the spring constant (K).
  • Knowledge of gravitational force calculations (g = 9.8 m/s²).
  • Ability to manipulate algebraic equations effectively.
NEXT STEPS
  • Review the principles of energy conservation in mechanical systems.
  • Study the derivation and application of Hooke's Law in spring mechanics.
  • Learn how to perform dimensional analysis to check the consistency of equations.
  • Practice solving similar physics problems involving friction and energy transformations.
USEFUL FOR

Students studying physics, particularly those focusing on mechanics, as well as educators looking for examples of energy and spring constant applications in problem-solving.

euphtone06
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Homework Statement


http://img339.imageshack.us/img339/4518/phys2lh6.gif


Homework Equations


W= -um2gh
m1gh=.5Kh^2-um2gh
.5K(h)^2
Final Eq?:
W=um2g*(2g(m1+um2)/K)


The Attempt at a Solution


.2(4)9.8*(2*9.8(7+.2(4))/9 = 133.1754667
I don't know if I went wrong in manipulating the equation but I suspect that's the issue?
 
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Sorry to bother you guys again but if I could please get some help tonight it would be much appreciated it must be turned in early tomorrow.
 

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