I attached a link with the description of the problem attached to it.
Total Mechanical Energy= KEinitial+PEinitial+Workexternal
The Attempt at a Solution
I was totally confused by this problem because the mass was not given to me. I'll show what I did:
KE=9*m/2-----top of hill
PE=245*m----top of hill
At bottom of hill PE is zero because of no height, therefore KEinitial+PEinitial=KEfinal
The problem wants to find the instantaneous velocity at the bottom of the hill. I am totally confused on how to solve this without the mass given though, help very greatly appreciated. If the attachment doesn't work or is too small, tell me and I will write out that question. I just need some boost to get me goin on this problem.