In Braking an Automobile, the Friction Between the Brake Drums

question 47

Short Answer

In braking an automobile, the friction between the brake drums and brake shoes converts the car's kinetic energy into heat. If a 1 500-kg automobile traveling at 30 m/s brakes to a halt, how much does the temperature rise in each of the four 8.0-kg brake drums? (The specific heat of each iron brake drum is 448 J/kg⋅°C).

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Definitions:

Stainless Steel

An alloy of iron and chromium that is resistant to rust, staining, and corrosion.

Damage Prevention

Actions or strategies aimed at stopping harm or degradation, especially in the context of physical properties or health.

Squeezed

The action of applying pressure from all sides, often to extract liquid or alter its shape.

Thumb Handle

A handle designed to be grasped or operated with the thumb, typically found in various tools or implements.