Acceleration of Spring Mass System - oneplusone

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SUMMARY

The discussion centers on the dynamics of a spring mass system, specifically addressing the relationship between displacement, velocity, and acceleration. At maximum amplitude, the velocity is zero, while the acceleration reaches its maximum magnitude, calculated using the formula -kx/m, where k is the spring constant and x is the displacement. The conversation emphasizes that acceleration is directly proportional to the displacement and inversely proportional to the mass of the object. Understanding these relationships is crucial for solving AP physics multiple-choice questions involving spring mass systems.

PREREQUISITES
  • Understanding of basic physics concepts such as displacement, velocity, and acceleration.
  • Familiarity with Hooke's Law and the spring constant (k).
  • Knowledge of calculus, specifically derivatives, as they relate to motion.
  • Basic grasp of mass (m) and its role in dynamics.
NEXT STEPS
  • Study the mathematical derivation of acceleration in harmonic motion.
  • Learn about the implications of Hooke's Law in real-world applications.
  • Explore the concept of simple harmonic motion (SHM) and its equations.
  • Investigate the effects of varying mass on the behavior of spring mass systems.
USEFUL FOR

Students preparing for AP Physics exams, educators teaching mechanics, and anyone interested in understanding the principles of oscillatory motion in spring mass systems.

oneplusone
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I always see those spring mass type questions on AP M.C. questions. Ones with a horizontal spring connected to a mass.
I understand that at the maximum amplitude, the velocity is zero since it is changing direction, and the displacement is maximum. However, what is the acceleration like? I can't seem to visualize it. Please help.

Cheers,
oneplusone
 
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Velocity is the first derivative of displacement and acceleration is the first derivative of velocity. If the displacement varies as a sin function, it's easy to calc velocity and acceleration. At max displacement, the magnitude of the acceleration is maximum and the velocity is zero.
 
oneplusone said:
I always see those spring mass type questions on AP M.C. questions. Ones with a horizontal spring connected to a mass.
I understand that at the maximum amplitude, the velocity is zero since it is changing direction, and the displacement is maximum. However, what is the acceleration like? I can't seem to visualize it. Please help.

Cheers,
oneplusone
At any displacement, the spring force is equal to the spring constant k times the displacement x. So the acceleration must be equal to -kx/m at all displacements.
 

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