Concept explainers
To Compare:The potential energies of two springs.
Answer to Problem 9SSC
The energy of the second spring is fourtimes greater than the energy of first spring.
Explanation of Solution
Given:
Spring 1 is extended by 2 cm and spring 2 is extended by 4 cm.
Formula used:
  
Where,
k: spring constant
x: spring displacement
Calculation:
The potential energy of a spring is given by formula,
  
Consider,
Potential energy of spring
Spring displacement of spring
Potential energy of spring
Spring displacement of spring
To contrast the potential energies of both the springs,
  
  
Conclusion:
Hence, the energy of the second spring is 4 times greater than the energy of first spring.
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Glencoe Physics: Principles and Problems, Student Edition
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