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OpenStudy (anonymous):
A car with mass M traveling at speed V has kinetic energy K. What is the kinetic energy of a second car that has the same mass M and twice the speed of the first car?
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OpenStudy (anonymous):
\[\color{green}{\text{E}_k \propto v^2}\] Kinetic energy is proportional to the square of the speed, given that mass remains constant. Doubling the speed means that kinetic energy increases by a factor of four. Kinetic energy quadruples when speed is doubled and mass remains constant.
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