Q1) The V thread of a screw jack has a single start with out side diameter 40 mm and 6 mm pitch. The angle of V is 55° and the load is carried on a swivel head of mean diameter 60 mm . the coefficient of friction between the nut and screw is 0.16 and that between the swivel head and the spindle is 0.1. Calculate the load required to be applied at the end of two levers each of effective length of 500 mm to raise an axial load of 1 KN and the efficiency of the lifting.

Q1) The V thread of a screw jack has a single start with out side diameter 40 mm and 6 mm pitch. The angle of V is 55° and the load is carried on a swivel head of mean diameter 60 mm . the coefficient of friction between the nut and screw is 0.16 and that between the swivel head and the spindle is 0.1. Calculate the load required to be applied at the end of two levers each of effective length of 500 mm to raise an axial load of 1 KN and the efficiency of the lifting.

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

Axial Load

When a bar of the uniform cross-section is acted by a load, such that the load acts along the longitudinal axis of the bar, such kinds of loadings are known as axial loadings. In general terms, a load is an external force acting on a component. An axial load acts perpendicular to the geometric cross-section of the component. Based on the direction of the application of the load, an axial load can be tensile or compressive. The analysis of bodies under the action of axial loads is generally studied under the branch of mechanics, known as statics.

Question

Q1) The V thread of a screw jack has a single start with out side
diameter 40 mm and 6 mm pitch. The angle of V is 55° and the load is
carried on a swivel head of mean diameter 60 mm. the coefficient of
friction between the nut and screw is 0.16 and that between the swivel
head and the spindle is 0.1.
Calculate the load required to be applied at the end of two levers each
of effective length of 500 mm to raise an axial load of 1 KN and the
efficiency of the lifting.

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