Answer
See the detailed answer below.
Work Step by Step
The inventor claims that his device can convert the thermal energy in the brakes into the forward motion of the car, hence saving a tremendous amount of gasoline.
But this violates the laws of thermodynamics, specifically the second law, which states that the total amount of energy in a closed system cannot be increased.
In other words, it is impossible to convert thermal energy into mechanical energy with 100% efficiency without violating this law.
We know that the moving car is in a state of low entropy while the hot brake atoms are in a state of high entropy.
And to convert the energy from the hot brake to move the car forward
needs us to decrease the entropy.
And this is impossible since it violates the second law of thermodynamics
