High School

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Two cars come to a stop from the same initial speed, one braking gently and the other braking hard.

Which car converts more kinetic energy to internal energy (e.g., thermal energy in the brakes)?

A. The car that braked hard
B. The car that braked gently
C. Cars convert an equal amount of kinetic energy
D. It's impossible to determine

Answer :

According to the law of conservation of energy, the car that apply hard brakes will convert more kinetic energy to thermal energy. Hence option 'a' is correct.

Describe kinetic energy.

Kinetic energy is any energy that an object gains as a consequence of motion. To accelerate an object, some force must be supplied to it. For apply a force, we must put more effort. After work is completed, energy is transmitted to the object, which then moves at a constant speed.

How can kinetic energy be used?

Running and pacing. When moving air strikes the blades of a windmill, it creates rotation, which ultimately results in the production of energy. When moving water's kinetic energy strikes a turbine at a hydroelectric facility, it is transformed into mechanical energy.

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