Concept explainers
A stuntman on a cliff has a PE of 10,000 J. Show that when his potential energy is 2000 J, his kinetic energy is 8000 J.
To show: Kinetic energy is 8000 J at given potential energy
Explanation of Solution
Given:
When stuntman is on the cliff,
New potential energy is
Formula Used:
According to energy conservation,
Initial energy = Final energy
Calculation:
At cliff height
From the conservation of energy, change in energy is zero. So,
Initial energy = Final energy
Conclusion:
Therefore, it is proved that when potential energy is 2000 J, kinetic energy of stuntman is 8000 J
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Conceptual Physics: The High School Physics Program
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