I've got a take home test and I'm kinda screwed cause I don't know how to do it. For anyone who is really good wit physics, this question would probably be pretty easy. If anyone could help me out that would be sooooooo sick.
Imagine that you are an engineer designing the breaks for a car. You need to choose the best material for making the disc. You have been given the choices of aluminum or steel. The car is to have a mass of 1600 Kg. Your design point is to bring the car from 20m/sec to 0m/sec. Assume that the car is operating at an air temperature of 20 C.
a) How much heat will be generated during the braking?
b) For each material, calculate the increase in temperature due to the braking operation.
c) For each material, compare the temperature increase to that of the melting temp of the material.
d) What material will provide the best braking?
e) Justify you conclusion using results from your analysis.
ya, the heat generated is the change in KE, then you use that to find the temp increase. I'm guessing aluminum will have a high cof than steel, but much lower melting point, so based on the temp and coefficient of friction, you need to decide which one is better.
shit man we aren't that far. sorry i can't help you out
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