Use Energy conservation to solve this problem
Initial energy stored in spring in the form of potential energy = 1/2 K (4.27 cm)^2
Final energy is kinetic energy of ram and remaining energy of spring = 1/2 m V^2 + 1/2 K (1.61 cm)^2
Equating both of them we get
0.153*V^2 = 39700*(4.27^2 - 1.61^2)*10^-4 (10^-4 due to cm to m conversion)
Solving this we get
V = 20.14 m/s
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A heavy-duty stapling gun uses a 0.153-kg metal rod that rams against the staple to eject...
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