Posted by **Mary** on Monday, December 7, 2009 at 5:59pm.

2) A roller coaster is at the top of a 98.2 m hill and has a mass of 1831.0 kg. It is traveling at a velocity of 23.7 m/s. What is the coaster car's TOTAL energy?

I used the eg=m*g*h equation and got a value of 1762081.16 .. i then used the ek=1/2mv^2 and got a value of 514227.195 .. for the total energy i added these 2 values and got a total of 6801507.671, is this correct?

3) A roller coaster car is at the top of a 53.8 m hill and has a mass of 1755.9. It is traveling at a velocity of 41.9. If the track is the only thing EXTERNAL to the system and the friction with the track removes 692.1 J of energy as lost energy, what is the system's TOTAL energy?

i used the eg=m*g*h and got a value of 925780.716 .. i then used the ek= 1/2mv^2 and got a value of 1541337.8 .. i added these together and got 2467118.516 and subtracted 692.1 to get a total energy of 2466426.416 .. is this the way to go about it and did i arrive at the right answer?

## Answer this Question

## Related Questions

- Physics - A roller coaster is at the top of a 98.2 m hill and has a mass of 1831...
- physics - A 10,000N car is on a roller coaster. at the top of the tallest hill (...
- Physics - A roller coaster works by gravitational energy. The coaster car is ...
- Math - The rattler roller coaster is 66 ft tall. if you are at the top of the ...
- Science - Can you Describe what happens when a roller coaster rolls downhill in ...
- physical science - A 250.0 kg roller coaster car has 20,000.0 J of potential ...
- science - A 250.0 kg roller coaster car has 20,000 J of potential energy at the ...
- Physical Science-please help - A 250.0 kg roller coaster car has 20000 J of ...
- physic - A roller-coaster car has a mass of 500 kg when fully loaded with ...
- Physics - At the beginning of a roller coaster ride, the car is lifted to the ...

More Related Questions