How can energy equations be applied to solve this problem?

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SUMMARY

This discussion focuses on the application of energy equations to solve a specific physics problem involving forces and relationships. The key equations referenced include the energy and work equations, which state that the change in energy is equal to the work done. A participant suggests that utilizing Newton's First Law may be more effective for solving the problem, particularly in calculating friction forces using the formula: friction force = μ(Mg - kx sin(θ)) = kx cos(θ).

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  • Understanding of energy and work equations in physics
  • Familiarity with Newton's laws of motion, particularly the First Law
  • Knowledge of friction coefficients and their application in calculations
  • Basic trigonometry for resolving forces into components
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Students studying physics, particularly those tackling mechanics problems involving energy, work, and forces. This discussion is beneficial for anyone looking to deepen their understanding of how to apply theoretical concepts to practical scenarios.

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Homework Statement



All of them in the picture attached.

Homework Equations



Energy and work equations;the change of the energy is equal to work done.

The Attempt at a Solution



ACtually,I don't know how to appy these equations if you can draw the forces and relationships and how to apply them into equations the logic behind it,I would be appreciated.Thanks.
 

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I think it's not the best idea to solve this task using energy and work. Maybe it would be easier to use the 1-st Newton's law (for solving the b) task):
the friction forse is: mu*(Mg-k*x*sin(theta)), and it is equal to k*x*cos(theta)
 

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