Thursday

April 17, 2014

April 17, 2014

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

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?

- science -
**bobpursley**, Monday, December 7, 2009 at 6:33pm1) no. How can you add 1.7 million + 514 thousand and get six million?

2) recheck math. I didn't get it.

**Related Questions**

Physics - A roller coaster is at the top of a 98.2 m hill and has a mass of 1831...

Physics - Another question :) At the top of its drop hill, a 1,000 kg roller ...

Physical Science - A 250.0 kg roller coaster has 2.000 x 10^4 Joule of ...

physics - A 10,000N car is on a roller coaster. at the top of the tallest hill (...

physical science - A 250.0 kg roller coaster car has 20,000.0 J of potential ...

Physical Science-please help - A 250.0 kg roller coaster car has 20000 J of ...

science - A 250.0 kg roller coaster car has 20,000 J of potential energy at the ...

Algebra - The velocity v of a roller coaster in feet per second at the bottom of...

physic - A roller-coaster car has a mass of 500 kg when fully loaded with ...

Science - A roller coaster is moving at 10 m/s at the top of a hill and 22 m/s ...