- #1
lamefeed
- 14
- 3
Hi, I've been trying to figure out how to solve this problem for a few hours, but whatever I do it seems to give me the wrong answer.
Problem statement:
Fetch data from the roller coaster model. Ignore friction. What is the mechanical energy in cart in situation 1?
## E = E_k + E_p ##
Which gives me this formula
## E = \frac{1}{2}mv^2 + mgh ##
After this I remove the mass since it's not been given in the task, and I'm left with:
## E = \frac{1}{2}v^2+ gh ##
When I fill in the numbers I get this:
## E = \frac{1}{2}0.5^2 + 9.81*50 = 490 J ##But I'm supposed to get 49 J ?!
Can't get any help from my teacher until tomorrow so would be lovely if some of you could tell me where I took a wrong turn(If I made a mistake)!
Cheers,
Lamefeed
Problem statement:
Fetch data from the roller coaster model. Ignore friction. What is the mechanical energy in cart in situation 1?
## E = E_k + E_p ##
Which gives me this formula
## E = \frac{1}{2}mv^2 + mgh ##
After this I remove the mass since it's not been given in the task, and I'm left with:
## E = \frac{1}{2}v^2+ gh ##
When I fill in the numbers I get this:
## E = \frac{1}{2}0.5^2 + 9.81*50 = 490 J ##But I'm supposed to get 49 J ?!
Can't get any help from my teacher until tomorrow so would be lovely if some of you could tell me where I took a wrong turn(If I made a mistake)!
Cheers,
Lamefeed