A 2,000 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 °C. What is the increase in the temperature of the brakes?
Answer options are
35.1 °C
45.2 °C
53.6 °C
22.3 °C
40.2 °C
A 2,000 kg car is traveling at 20.0 m/s down a long mountain grade of 1.00%....
An old car is traveling down a long, straight, dry road at 25.0 m/s when the driver slams on the brakes, locking the wheels. The car comes to a complete stop after sliding 235 m in a straight line. If the car has a mass of 755 kg, what is the coefficient of kinetic friction between the tires and the road?
A 1,200-kg car is traveling on an icy horizontal road at 30 m/s. The maximum rate at which the car can decelerate without sliding on the ice is 1.2 m/s2; reaching this value will immediately result in sliding uncontrollably with a reduced sliding friction of 700 N. If the driver panics and slams hard on the brakes, then how far will the car slide before stopping? Answer in km.
13. A 0.200-kg aluminum plate, initially at 20°C, slides down a 13.0-m-lon to the horizontal. The force of kinetic friction exactly balances the component of gravity down the plane so that the plate once started, glides down at constant velocity. If 90% of the mechanical energy of the system is absorbed by the aluminum is 900 J/kg)°C) g surface, inclined at a 25.0° angle aluminum, what is its temperature increase at the bottom of the incline? (Specific heat for a....