The root diameter of a triple threaded power screw is 550 mm It has a pitch of 10 mm It is used to lift a load of 15 kN. The collar of the screw has an outside diameter of 100 mm and an inner diameter 60 mm Find the force applied at a radius of 950 mm if the coeffcient of friction for both threads and collar is 0.20.

A square thread jackscrew has a 2 threads per inch. It is to lift 15tons. The friction radius of the collar is 1 in. The coefficient offriction between the threads of the screw and base is 0.15, thatbetween the screw and the collar is 0.13. Determine:a. The diameter of the root of the screw if theallowable stress in compression is 6 000 psi.b. The torque required to turn the screw.c. The pull required at the end of a 5 ft bar raises theload.d. The twisting moment exerted at the root of thethreads.e. The power output of the screw if it is turning at 60rpm.f. The power input of the screw.g. The efficiency of the screw and collar

A screw jack has a thread with a pitch of 4 mm and diameter 22mm. The coefficient of friction is 0.24. Calculate the efficiency when a load is raised. Calculate the effort needed to raise 8kN with a handle 500 mm long.

3 Please help. Provide Free Body Diagram, labeled with appropriate quantities to better understand. Also solve. Thank you.