# Does energy barely leave the sphere?

1. Mar 14, 2006

### alex_boothby

hi,

ive just found ou that ke (translation) + ke (rotational) = Potetntial

i.e • ½ I *angular speed(squared) + 1/2mv(squared) = mgh

is ther anything else i can derive from this. as that is all basically ive written, and that , This proves that hardly any energy is lost, with an average of less than 0.000001738% loss of energy, it shows that the energy does not leave the sphere

2. Mar 14, 2006

### stunner5000pt

you have to be more specific... like perhaps tell us the question... because im not sure from where u got that percentage

3. Mar 15, 2006

### alex_boothby

its a ball bearing rolling down a slope, and then released at different distances

4. Mar 16, 2006

### vaishakh

Why should energy be lost from sphere? The equation shows energy in the sphere is conserved. As stunner was stunned, even I am stunned with the percentage of energy loss you gave. An ideal ball bearing, which is an ideal sphere will never lose an energy.

5. Mar 16, 2006

### Da-Force

Last edited by a moderator: Apr 22, 2017