A car travelling at 100 km/h suddenly brakes to a stop. What happened to the kinetic energy of the car? It was transformed into elastic potential energy. It was transformed into thermal energy. It transformed to gravitational potential energy. It was transferred out of the system by work
Question
A car travelling at 100 km/h suddenly brakes to a stop. What happened to the kinetic energy of the car? It was transformed into elastic potential energy. It was transformed into thermal energy. It transformed to gravitational potential energy. It was transferred out of the system by work
Solution
When a car traveling at 100 km/h suddenly brakes to a stop, the kinetic energy of the car is transformed primarily into thermal energy. This is due to the friction between the brake pads and the wheels, which generates heat. Some of the energy may also be transferred out of the system by work, such as sound energy from the noise of braking. The kinetic energy is not transformed into elastic potential energy or gravitational potential energy in this case.
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