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so what i was thinking is this:

f=ma and in this case a=v^2/r so i have .....

f=mv^2/r and i know what m and r are so i need to find v

ei=ef

mgh=mgh+.5mv^2

1500(9.8)23=1500(9.8)15+.5(1500)v^2

v^2=156.8

then i put this into f=mv^2/r and f=3.14 x10^4

is that right?