Total mechanical work, solving for x

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SUMMARY

The discussion centers on solving the equation for total mechanical work, specifically the equation 1/2mv^2 = 1/2kx^2 + umgx. The user struggles with isolating x and realizes that the equation can be transformed into a quadratic form. The key insight is recognizing the presence of a quadratic equation in x, which simplifies the problem-solving process. The user plans to revisit the problem after further consideration of quadratic equations.

PREREQUISITES
  • Understanding of mechanical work and energy concepts
  • Familiarity with quadratic equations and their properties
  • Basic algebraic manipulation skills
  • Knowledge of variables such as mass (m), velocity (v), spring constant (k), and gravitational force (mg)
NEXT STEPS
  • Study the properties of quadratic equations and their solutions
  • Learn how to apply the quadratic formula to solve for x
  • Explore mechanical energy conservation principles in physics
  • Practice solving similar mechanical work problems involving springs and gravitational forces
USEFUL FOR

Students studying physics, particularly those focusing on mechanics, as well as educators looking for examples of solving quadratic equations in real-world applications.

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Homework Statement



I understand the problem conceptually. I just need help solving for x, which is the hardest part of the problem for me.

1/2mv^2 = 1/2kx^2 + umgx

The Attempt at a Solution



Not really sure how to solve this. I tried and tried to separate by x but nothing worked. Here are 1 of the attempts I suppose. I feel pretty stumped here.

[tex]1/2mv^2 = 1/2kx^2 + umgx[/tex]
[tex]1/2mv^2 - umgx = 1/2kx^2[/tex]
[tex]\frac{mv^2}{k} - \frac{2umgx}{k} = x^2[/tex]
?
 
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Looks like you've got a quadratic equation in x on your hands. Sound familiar?
 
gneill said:
Looks like you've got a quadratic equation in x on your hands. Sound familiar?

I thought a lot about how I couldn't expand x^2 + x.. but when you mentioned quadratic equation it came to me right now.. I'll get back to this once I get home.
 

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