Aheavy-duty stapling gun uses a 0.179 kg metal rod that rams against the staple to eject it. the rod is attached and pushed by a stiff spring called a ram spring (k = 37107 n/m). the mass of this spring may be ignored. squeezing the handle of the gun first compresses. the ram spring is compressed by 3.20 10-2 m from its unstrained length and then releases from rest. assuming that the ram spring is oriented vertically and is still compressed by 1.35 10-2 m when the downward-moving ram hits the staple, find the speed of the ram at the instant of contact.