6) A screw jack is used to lift a mass of 500kg. The screw has a thread with a pitch of 8 mm. An effort of 55 N has to be applied tangentially at a radius of 290 mm to lift the load. Calculate the velocity ratio, the mechanical advantage and the efficiency of the screw jack..

6) A screw jack is used to lift a mass of 500kg. The screw has a thread with a pitch of 8 mm. An effort of 55 N has to be applied tangentially at a radius of 290 mm to lift the load. Calculate the velocity ratio, the mechanical advantage and the efficiency of the screw 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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Concept explainers

Forming and Shaping

Metal forming is a category of metalworking process through which the material can be given the desired shape and size by subjecting it to plastic deformation, where the component undergoes bulk deformation process upon application of loads. Unlike the shearing and machining process, the material does not undergo up to a failure point as indicated in the stress-strain curve. Hence, the stresses induced during the forming process are greater than yield strength but less than the failure strength of the material. The process does not lead to the loss of material, so it can be said to be an economical process. During forming, the material is subjected to tensile forces, compressive forces, bending, and shearing loading conditions. The material should possess the property of ductility to undergo the forming process.

Question

6) A screw jack is used to lift a mass of 500kg. The screw has a thread with a pitch of 8 mm. An effort
of 55 N has to be applied tangentially at a radius of 290 mm to lift the load. Calculate the velocity
ratio, the mechanical advantage and the efficiency of the screw jack.

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