- #71
A.T.
Science Advisor
- 12,571
- 3,717
DaleSpam said:The correct answer is that the road performs 0 work on the car. Any method that disagrees with that is simply wrong.
Rather than "wrong", I would say inconsistent with the thermodynamic definition of work. I like this definition, and I used per default in post #2 to give a straight forward answer.
But still, I would like to know how/if the F*d definition can be applied when non-rigid bodies are modeled as rigid blocks. Or when such modelling is permissible. Therefore I would like to hear you thoughts on my question from post #55:
A.T. said:So in respect to Newtons 3rd Law force pairs and work we we can say:
If kinetic energy is converted into other energy forms at the interface, then the positive work done by one force can be less than the negative work done by the other force.
What about the opposite situation?
If kinetic energy is generated from other energy forms at the interface, then the positive work done by one force can be more than the negative work done by the other force.