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Spring Constant

Definition

The spring constant represents how stiff or flexible a spring is. It determines how much force will be required to stretch or compress a spring by a certain distance.

Analogy

Imagine stretching out different rubber bands - one thin and one thick. The thicker rubber band would have a higher spring constant because it requires more force to stretch it compared to the thinner one.

Related terms

Hooke's Law: Hooke's Law states that the force exerted by a spring is directly proportional to the displacement of the spring from its equilibrium position.

Elastic Potential Energy: Elastic potential energy is the energy stored in an object when it is stretched or compressed, such as a spring.

Equilibrium Position: The equilibrium position of a spring is where there is no net force acting on it and it remains at rest.

"Spring Constant" appears in:

Practice Questions (4)

  • If a spring has a spring constant of 5N/m and is compressed 50cm from its equilibrium position, what is its elastic potential energy?
  • A 2.5kg block moving at 5.6 m/s hits a spring with a spring constant of 50N/m. How much is the spring compressed from its equilibrium position?
  • If the kinetic energy of a spring at its equilibrium position preparing to move to its negative amplitude is 20J, what is its displacement as it moves to its negative amplitude position given a spring constant of 100N/m. Assume surface is frictionless.
  • If the spring constant/stiffness (k) of a mass-spring oscillator is quadrupled, its period will...


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AP® and SAT® are trademarks registered by the College Board, which is not affiliated with, and does not endorse this website.