Respuesta :
When a car traveled on a flat road, keeping its kinetic energy increased over time, while its potential energy remained constant. The correct option is A.
What is mechanical energy?
Mechanical energy is the sum of kinetic energy and potential energy.
As the car's kinetic energy is increasing, but there is no change in potential energy, then mechanical energy will increase.
Therefore, the car’s mechanical energy increased because the sum of the car’s kinetic and potential energy increased over time. The correct option is A.
Learn more about mechanical energy.
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