A 2000 Kg Car Is Traveling at 15 $^{\circ}$ CWhat Is the Increase in the Temperature of the Brakes

question 21

Multiple Choice

A 2000 kg car is traveling at 15.0 m/s down a long mountain grade of 2.0%.The mountain road is 5.0 km long.The heat generated at the brakes due to friction heats up the brakes.The mass of the brake system is 20.0 kg and it has a specific heat of 0.200 kcal/kg $^{\circ}$ C.What is the increase in the temperature of the brakes?

• A) 43\(^{\circ}\)C
• B) 54\(^{\circ}\)C
• C) 83\(^{\circ}\)C
• D) 95\(^{\circ}\)C
• E) 117\(^{\circ}\)C

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