A car jack uses a single square-thread screw to raise a known load. The major diameter and pitch of the screw and the thrust collar mean diameter are known. Running friction coefficients are estimated. Find: (a) Determine the thread depth and helix angle.(b) Estimate the starting torque for raising and lowering the load.(c) Estimate the efficiency of the jack for raising the load. (d) Estimate the power required to drive the screw at a constant 1 revolution per second. Schematic and Given Data: Load 50 kNNOTE: ANSWER ONLY LETETRS C AND D. Load50 kNdSingle square-thread screwD = 36 mmp = 6 mmdc = 80 mmf = 0.2f = 0.16

Answered: Image /qna-images/answer/aaed25a7-30c9-4df9-a22d-cd06b202d68e.jpg

Answered: (c) Estimate the efficiency of the jack…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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A car jack uses a single square-thread screw to raise a known load. The major diameter and pitch of the screw and the thrust collar mean diameter are known. Running friction coefficients are estimated. Find:

(a) Determine the thread depth and helix angle.

(b) Estimate the starting torque for raising and lowering the load.

(d) Estimate the power required to drive the screw at a constant 1 revolution per second. Schematic and Given Data: Load 50 kN

NOTE: ANSWER ONLY LETETRS C AND D.

Load
50 kN
d
Single square-thread screw
D = 36 mm
p = 6 mm
dc = 80 mm
f = 0.2
f = 0.16

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