A 2000 Kg Car Is Traveling at 20 $^{\circ}$ CWhat Is the Increase in the Temperature of the Brakes

A 2000 kg car is traveling at 20.0 m/s down a long mountain grade of 1.00%.The mountain road is 3.00 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) 22.3 $^{\circ}$ C
B) 35.1 $^{\circ}$ C
C) 40.2 $^{\circ}$ C
D) 45.2 $^{\circ}$ C
E) 53.6 $^{\circ}$ C

Correct Answer:

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