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If a particle is moving down on an inclined plane, then constraint on its motion is its contact with plane. Any displacement along the plane is consistent with the constraint. If the force does no virtual work then the constraint is called workless. 

For Single Particle: A particle subjected to workless constraint is in equilibrium iff zero virtual work done by the a…</description>
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[Calculus with Analytic Geometry by Dr. S. M. Yusuf and Prof. Muhammad Amin]
Calculus with Analytic Geometry by Dr. S. M. Yusuf and Prof. Muhammad Amin, published by Ilmi Kitab Khana, Lahore-Pakistan is one of the books studied widely in Bachelor and undergraduate classes inclduing different engineering programs. There are total of ten chapters. Solutions of the books are given in the chapters listed below. The only aim to publish the soltuions is to pro…</description>
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[BSc Mathematical Method]
Notes of the Mathematical Method written by by S.M. Yusuf, A. Majeed and M. Amin and published by Ilmi Kitab Khana, Lahore. This is an old and good book of mathematical method.

The notes given here are provided by awesome peoples, who dare to help others. Some of the notes are send by the authors of these notes and other are send by people who didn&#039;t write but share these notes as Open Educational Resources (OER). We are thankful to</description>
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[Number Theory by Prof. M. Tanveer]
These notes are very helpful to prepare one of the sections of mathematics for BSc. Also these notes can be used for other classes. 
 Author:   Prof. M. Tanveer   Type:  Handwritten   Format:  PDF (972 kB)    Pages:  $a,b, \in \mathbb{Z}$$a \neq 0$$a$$b$$c\in \mathbb{Z}$$b=ac$$a,b, \in \mathbb{Z}$$c \in \mathbb{Z}$$a$$b$$c | a$$c | b$</description>
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