- #1

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I kind of get the concept and I'm using conservation of energy but he numbers don't work out. I know the answer is supposed to be w^2 = 5g/7R

I set up PE = KE + Rotational KE but it doesn't work.

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- Thread starter S0C0M988
- Start date

- #1

- 6

- 0

I kind of get the concept and I'm using conservation of energy but he numbers don't work out. I know the answer is supposed to be w^2 = 5g/7R

I set up PE = KE + Rotational KE but it doesn't work.

- #2

OlderDan

Science Advisor

Homework Helper

- 3,021

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It worked for me except I have R - b instead of R. Assuming a small marble. R is close enough.S0C0M988 said:

I kind of get the concept and I'm using conservation of energy but he numbers don't work out. I know the answer is supposed to be w^2 = 5g/7R

I set up PE = KE + Rotational KE but it doesn't work.

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