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Momentum and Energy Comparison
Worksheet
Grade Level
Physics
12.70 Momentum and Energy Comparison
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An electron starts from rest and accelerates across a voltage difference. The system is the electron only; the electric field source is not included. Which conservation statement is correct?
A
Both quantities are conserved for the electron in the electric field.
B
Neither total momentum nor total kinetic energy is conserved for the electron in the electric field.
C
Total momentum is conserved, but total kinetic energy is not, for the electron in the electric field.
D
The kinetic-energy total stays constant while momentum changes for the electron in the electric field.
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