Question

technician a says the frictional energy on the drum surface creates heat, and this heat is dissipated to the surrounding air as the drum rotates with the wheel. technician b says the thinner a drum gets, the better its ability to absorb and release heat. who is correct?

Answer 1

Technician A is correct regarding heat generation from friction. Technician B is incorrect; thinner drums may not dissipate heat better.

Step-by-step explanation:

The discussion is around the heat dissipation in vehicle brake systems and the effects of wear on drum brakes. Technician A is correct in saying that the frictional energy on the drum surface creates heat, which is then dissipated to the surrounding air as the drum rotates with the wheel. This is analogous to when you rub your hands together to generate warmth. However, Technician B's statement is incorrect; as the drum gets thinner, its ability to absorb and release heat may actually worsen due to reduced mass and potential structural integrity issues, which compromises its performance and can lead to increased temperatures and potential brake failure.