Concept explainers
The effective spring constant of the bumper material.
Answer to Problem 80GP
Solution:
Explanation of Solution
The kinetic energy of the car is converted to spring potential energy of the bumper.
Given:
The mass of the car is
The maximum speed limit of the bumper is:
The compression of the bumper material:
Formula used: If the effective spring constant is k , then from energy conservation:
Where, m is the mass, v is the speed and xis the extended or compressed length of spring.
Calculation:
Re-arrange and substitute the values:
Conclusion: The approximate effective spring constant of the spring is
Chapter 6 Solutions
Physics: Principles with Applications
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