
Concept explainers
Increase in the potential energy of the barbell-earth system.

Answer to Problem 51A
3439.8 J
Explanation of Solution
Given:
Mass of barbell,
Height of barbell,
Formula used:
Here, U is potential energy, m is mass, g is the acceleration due to gravity and h is height.
Calculation:
Acceleration due to gravity on earth is
The increase in potential energy of the barbell-earth system is
Conclusion:
So, the potential energy of the book-earth system is 3439.8 J.
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