Posted by Anonymous on Sunday, January 2, 2011 at 5:47pm.
Use energy:
gravitational potential energy: GPE = mgh
kinetic energy: KE = (1/2)m*v^2
By conservation of energy, GPEi+KEi = GPEf + KEf. (Final energy = initial energy).
At the bottom of the hill, GPEf = 0 (h=0). At the top of the hill, KEi = 0(v=0). Find the final kinetic energy, and from it, the final velocity.
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