1. A hammer of mass 0.75kg has a velocity of 3.5 m/s just before it hits...

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1. A hammer of mass 0.75kg has a velocity of 3.5 m/s just before it hits a nail. After driving the nail 2 cm into the wall, the hammer lost all its velocity. (a) What are the initial and final kinetic energies of the hammer? (b) What was the dissipated energy in this process? (c) What was the average resistance force of the wall to the nail? 1. A hammer of mass 0.75kg has a velocity of 3.5 m/s just before it hits a nail. After driving the nail 2 cm into the wall, the hammer lost all its velocity. (a) What are the initial and final kinetic energies of the hammer? (b) What was the dissipated energy in this process? (c) What was the average resistance force of the wall to the nail?

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