Posted by **Kaylynn** on Monday, April 18, 2011 at 9:27am.

A car with a mass of 890 kg travels at a speed of 20.0 m/s. Seeing that the road ahead is blocked by a rock slide, the driver applies the brakes, stopping the car. The work of stopping the car becomes thermal energy of the car’s four disk brake rotors; in other words, all of the energy goes into the brake rotors. Each rotor has a mass of 6.5 kg. The rotors are made of a metal with a specific heat capacity of 420 J/(kg °C).

After the car is stopped, how much has the temperature of its brake rotors increased? Give your answer in degrees Celsius. Assume that all four brake rotors receive the same amount of heat.

## Answer This Question

## Related Questions

- physics - A car with a mass of 890 kg travels at a speed of 20.0 m/s. Seeing ...
- Physics - A car with a mass of 890 kg travels at a speed of 20.0 m/s. Seeing ...
- physics - The speed limit in a school zone is 40.0 km/hr. A driver traveling at ...
- physics - The speed limit in a school zone is 38 km/h. A driver traveling at ...
- Physics - A car with mass of 1875kg is traveling along a country road when the ...
- Physics - A driver approaches an intersection at a speed of 50km/h, when the ...
- physics - A car travels along a roadwith a speed of v=25 m/s (about 50 mi/h). ...
- Physics - The speed limit in a school zone is 40 km/h. A driver traveling at ...
- Physics - Problem 4- Speedy car, driving at 30 m/s. The driver suddenly ...
- Physics - A car is initially travelling at a constant speed of 20 m/s along a ...

More Related Questions