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.

v = 13.22 m/s

Explanation:

mass of rod (M) = 0.179 kg

spring constant (k) = 37107 N/m

initial compression (Ei) = 3.2 x 10^{-2} m

final compression (Ef) = 1.35 x 10^{-2} m

acceleration due to gravity (g) = 9.8 m/s^{2}

from the conservation of energy, the total energy in the system before impact = the total energy in the system after impact

where

now we rearrange the equation above to make v the subject of the formula

v = 13.22 m/s

firearm identification is the process of analyzing the bullets and cartridge cases left at a crime scene to determine if they came from a particular firearm. marks on the bullets and cartridges may be common to every firearm of that type. these are called class characteristics.

the journeys of marquette, joliet and la salle a) new france expand.

all three of these explorers explored the midwest and the area around the great lakes, which they subsequently claimed for france.

this was a big portion of territory and expanded new france which before then only consisted of quebec province in northeastern canada