Concept explainers
Energy added by the spring.
Answer to Problem 87A
Explanation of Solution
Given:
Mass of carts,
Initial speed of lab cart,
The 2 kg cart come to rest due to uncompressed spring.
Formula Used:
Kinetic energy is,
Here,
Momentum is,
Here, ,
Calculation:
From (1) initial energy of the system is,
From (2) initial momentum of the system is,
As the 2 kg cart come to rest due to uncompressed spring. So from conservation of momentum,
So,
So, final energy of the system is
Thus, change in energy or energy added by spring is
Conclusion:
Therefore,
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Glencoe Physics: Principles and Problems, Student Edition
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