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3) A toy spring gun is used to shoot a 30 g marble vertically upward. The uncompressed length
of the spring is 200 mm. Before the gun is shot, the spring is compressed to a length of 60
mm. The spring constant is 175 N/m.
a) Calculate the velocity of the marble when it leaves the gun in m/s.
b) Calculate the maximum height the marble will reach in m relative to its starting position
inside the gun.
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