# C4 - Applied Science Department (ASD) Centre for Foundation...

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FOSEE , MULTIMEDIA UNIVERSITY (436821-T) MELAKA CAMPUS, JALAN AYER KEROH LAMA, 75450 MELAKA, MALAYSIA. Tel 606 252 3594 Fax 606 231 8799 URL: http://fosee.mmu.edu.my/~asd/ PPH0075 Physics 1 Foundation in Engineering ONLINE NOTES Lecture Notes Chapter 4: Static Equilibrium Applied Science Department (ASD) Centre for Foundation Studies and Extension Education (FOSEE)

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PPH0075 Physics 1 Chapter 4 ______________________________________________________________________________________ ASD2008/09 1/ 8 Static Equilibrium 4.2 The conditions of equilibrium 1 st condition 2 nd condition F = 0, τ = 0 F x = 0 and about any axis F y = 0 τ -the tendency to rotate about an axis ) ( ) ( Nm F l Nm F r × = × = τ 4.1 The Equilibrium of forces Static Translational Equilibrium Equilibrium -object at rest - object moves with constant v 4.3 The center of mass and the center of gravity Center of mass- the point that moves in the same path when the body rotates X cm = N N N m m m x m x m x m + + + + + + ........ ......... 2 1 2 2 1 1 Y cm = N N N m m m y m y m y m + + + + + + ........ ......... 2 1 2 2 1 1 Center of gravity- the geometric point, determined by experiment method 4.4 Moment of inertia Moment of inertia - resistance of an object to change its rotational motion about an axis Moment of inertia , I = m 1 r 1 2 + m 2 r 2 2 + m 3 r 3 2 +……….+ m n r n 2 = n i i r m 1 2
PPH0075 Physics 1 Chapter 4 ______________________________________________________________________________________ ASD2008/09 2/ 8

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## This note was uploaded on 10/30/2010 for the course FOSEE CVL1040 taught by Professor None during the Spring '09 term at Multimedia University, Cyberjaya.

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C4 - Applied Science Department (ASD) Centre for Foundation...

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