Thursday
July 24, 2014

Homework Help: physics

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 carís 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 įC).
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

First Name:
School Subject:
Answer:

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 - The speed limit in a school zone is 40 km/h. A driver traveling at ...
Physics - A car is being driven along a country road on a dark and rainy night ...
Physics - A driver of a car going 95.0 km/h suddenly sees the lights of a ...
physics - a car moving on a straight road with a speed of 20m/s. at t=0 the ...
Physics - A car with mass of 1875kg is traveling along a country road when the ...
Physics - A driver of a car going 95.0 km/h suddenly sees the lights of a ...

Search
Members