Question

A car in motion has kinetic energy. What happens to the kinetic energy when the car brakes to a stop? The kinetic energy is transformed into potential energy ready to be released when the car starts back up. The kinetic energy is lost since energy is not conserved. The kinetic energy is transformed into heat energy evident by the warmth of the tires and is dissipated. The kinetic energy is still there, it is just not observable.

Answer 1

the kinetic energy is still there, it is just not observable

Step-by-step explanation:

Conservation of energy states that energy cannot be created nor destroyed, it has to be transformed, so it can't just be lost. It also can not just dissipate after it becomes heat energy. I originally answered with the potential energy and got it wrong, so it has to be that the kinetic energy is still there.

Answer 2

When a moving car brakes to a stop the kinetic energy of the car is converted to heat energy.

Step-by-step explanation:

A moving car has kinetic energy.

It is given by the equation
`k=(1)/(2) mv^2`

Where m denotes mass of the car and v denote sits velocity. When the brakes are applied the velocity becomes zero and the car doesn’t possess kinetic energy anymore.

According to law of conservation of energy can neither be created nor be destroyed but can only be transformed from one form to another. On coming to a stop, the kinetic energy of the car gets converted to heat. The friction between the tyre and the road heats up the tyre.