By what mechanism is a person injured when he or she falls from a significant height?
A. As the person falls, the amount of kinetic energy is converted into work; work is then converted to kinetic energy upon impact.
B. Kinetic energy is converted to potential energy; the potential energy is then converted into the work of bringing the body to a stop.
C. Potential energy is created as the person is falling; the potential energy is then converted into kinetic energy upon impact.
D. Potential energy is converted to kinetic energy; the kinetic energy is then converted into the work of bringing the body to a stop.
Answer: D. Potential energy is converted to kinetic energy; the kinetic energy is then converted into the work of bringing the body to a stop.
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