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In Braking an Automobile,the Friction Between the Brake Drums and Brake

Question 26

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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. °\degree C).

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