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Parzival
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Homework Statement
At a carnival, you can try to ring a bell by striking a target with a 9.00 kg hammer. In response, a 0.400 kg metal piece is sent upward toward the bell, which is 5.00 m above. Suppose that 25.0% of the hammer's kinetic energy is used to do the work of sending the metal piece upward. How fast must the hammer be moving when it strikes the target so that the bell just barely rings?
Homework Equations
W = final mechanical energy - initial mechanical energy
1/2m*final velocity^2 + mg*finalheight = 1/2m*initial velocity^2 + mg*initial height
Conservation of mechanical energy
The Attempt at a Solution
I tried setting up an equation using the second given equation, but unfortunately there are too many variables.