Determining Spring Constant After Collision

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SUMMARY

The discussion centers on calculating the spring constant of an ideal Hooke's Law spring after a head-on elastic collision between a 1.2 kg cart and a stationary 2.0 kg cart. The initial potential energy of the 1.2 kg cart, derived from its height of 1.8 m, is converted into kinetic energy and subsequently into spring potential energy at maximum compression of 2.0 cm. The relevant equations used are the conservation of energy, expressed as Em1 = Em2, and the spring potential energy formula, mgh = 1/2 kx². The solution requires careful consideration of the energy distribution during the collision.

PREREQUISITES
  • Understanding of conservation of energy principles
  • Familiarity with Hooke's Law and spring constants
  • Knowledge of elastic collisions in physics
  • Ability to manipulate equations involving kinetic and potential energy
NEXT STEPS
  • Study the principles of elastic collisions in detail
  • Learn how to derive the spring constant using energy conservation
  • Explore examples of Hooke's Law applications in real-world scenarios
  • Investigate the effects of mass and height on collision outcomes
USEFUL FOR

Students studying physics, particularly those focusing on mechanics, as well as educators looking for practical examples of energy conservation and spring dynamics in elastic collisions.

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Homework Statement


1.2 kg cart slides down frictionless ramp from a height of 1.8m and then onto a horizontal surface where it has a head-on elastic collision with a stationary 2.0kg cart cushioned by an ideal Hooke's Law spring. Maximum compression of spring is 2.0 cm
Determine the spring Constant


Homework Equations





The Attempt at a Solution


Em1=Em2
mgh=1/2kx^2
But this did not get me the answer
 
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fdajkffk said:

Homework Statement


1.2 kg cart slides down frictionless ramp from a height of 1.8m and then onto a horizontal surface where it has a head-on elastic collision with a stationary 2.0kg cart cushioned by an ideal Hooke's Law spring. Maximum compression of spring is 2.0 cm
Determine the spring Constant


Homework Equations





The Attempt at a Solution


Em1=Em2
mgh=1/2kx^2
But this did not get me the answer

Don't forget that when the spring is at maximum compression, the (previously) stationary cart has already begun to move, so only part of the Initial energy of other Cart is stored in the spring.
 

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