Concept explainers
Change in temperature of the brakes.
Answer to Problem 73A
Explanation of Solution
Given:
Mass of automobile,
Final velocity of automobile,
Initial velocity of automobile,
Mass of aluminum brakes,
Formula Used:
Change in kinetic energy is given as,
Change in thermal energy is given as,
From the law of thermodynamics,
Where
Calculation:
Here,
As specific heat of aluminum is
So,
Conclusion:
Therefore, the change in temperature of the brake is
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