Asingle-square threaded 35-mm power screw is 35 mm in diameter with a pitch of 5 mm. a vertical load on the screw reaches a maximum of 5 kn. the coefficients of friction are 0.06 for the collar and 0.09 for the threads. the frictional diameter of the collar is 45 mm. find the overall efficiency and the torque to "raise" and "lower" the load. repeat this problem if acme screw is used in this design.

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explanation:

assault rifle is a rapid-fire, magazine-fed rifle designed for military use. it is a shoulder-fired weapon that allows the shooter to select between semi-automatic (requiring you pull the trigger for each shot), fully automatic (hold the trigger and the gun continuously fires) or three-shot-burst modes.

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