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September 15, 2014

Homework Help: physics

Posted by Jayde Larson on Thursday, March 14, 2013 at 6:56pm.

When a driver brakes an automobile, friction between the brake disks and the brake pads converts part of the car's translational kinetic energy to internal energy. If a 1280 kg automobile traveling at 30.8 m/s comes to a halt after its brakes are applied, how much can the temperature rise in each of the four 3.5 kg steel brake disks? Assume the disks are made of iron (cp = 448 J/kgC) and that all of the kinetic energy is distributed in equal parts to the internal energy of the brakes.

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