a fast moving car has 0.5MJ of kinetic energy. the driver brakes and the car comes to a halt. how much work is done by the force provided by the brakes
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car is accidental and provid by ambulance
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Explanation:The work done is the change of kinetic energy in this situation. The kinetic energy change = -0.5MJ (negative as it has decreased) So the work done is -0.5MJ (negative as it has taken-away kinetic energy from th car; a positive value for work done in this situation would mean work done has increased the kinetic energy.
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