Efficient Energy Calculations for a Ball Down a Ramp

[TN17]

I'm supposed to find two different methods to find the loss of energy of a ball down a ramp.

I'm given only the following information:
Mass of ball = 0.0083 kg
and
http://i1097.photobucket.com/albums/...cs_/Energy.jpg

2. Homework Equations

E = mgh
E = 0.5mv^2

The Attempt at a Solution

I already found one way:
To compare the energy at the top of the ramp, which is E = mgh and the energy at the bottom of the ramp, E2 = mgh + 0.5mv^2 and also compare E to the energy at the bottom of the projectile, E3 = 0.5mv^2.

(I found "v" by using projectile motion).

What is another way to calculate loss of energy?

 

[issacnewton]

reload the image

 

[TN17]

reload the image

Here is the link:
http://s1097.photobucket.com/albums/g349/Physics_/?action=view&current=Energy.jpg

Or go to: http://s1097.photobucket.com/albums/g349/Physics_/ and click on the thumbnail.

 

[issacnewton]

Do you want to find the speed of the ball at the bottom of the ramp or all the way down when it hits the ground. One way of course is using energy conservation. For another way, assuming that the ball leaves the ramp in horizontal direction, we can find the speed of the ball using projectile motion equations for rest of its journey till it hits the ground.
But for calculating the loss of energy, I think we will need to use the principle of conservation of energy.