Mechanics Composition

Faculty of Executive and Technology (FET)

PPH 0125 Technicians Foundation in Engineering

ON THE WEB NOTES

Chapter 1 Physical Quantities

Faculty of Engineering and Technology, Multimedia College or university, Jalan Anteriormente Keroh Lama, Bukit Beruang, 75450 Melaka, Malaysia.

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MECHANICS

Contents 1 . 0 1 . 1 1 . a couple of 1 . 3 1 . some 1 . a few 1 . six 1 . six Introduction to SI Units. Fundamental Quantities Made Quantities Alteration of Units Scalar and Vector Quantity Factor of ten Simplification (Standard Prefixes) Dimension: Homogeneity of Physical Equations. Vectors. Component of a vector. Vector addition and Subtraction. Graphic Methods. Part Methods. Department of transportation Product and Cross Merchandise.

Mind Map

OBJECTIVES

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Upon completing this phase, you should be capable to: 1) 2) 3) 4) 5) 6) list the bottom quantities and the SI models. use common standard prefixes explain the advantage of and apply dimensional analysis and device analysis. separate scalars and vectors. Put and take away vectors graphically and by the component method. determine the dot and cross goods of offered vectors.

1 ) 0

INTRODUCTION TO SI PRODUCTS

п‚· п‚· п‚· п‚· п‚· п‚· п‚· A physical property which can be measured is referred to as a physical variety. The most typically encountered physical quantities are length, mass, time, current, temperature, mild intensity and amount of substance. These kinds of seven quantities are referred to as base volumes. Other physical quantities is usually described by a numeral value and a variety of these quantities. A physical variety is referred to by a numerical value and a unit. One is the standard size to get a physical quantity. Different devices can be used to identify the same amount. For example , the peak of a person can be indicated in foot and in ., or in meters and centimeters. The units of a certain quantity may be converted from a single system of dimension to another. Such conversion are sometimes necessary. It can be, however , most practical to work consistently within the same system of products.

1 . one particular

BASIC AMOUNTS

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п‚· п‚· п‚·

The international system of products commonly used in science a great engineering may be the Systeme Intercontinental d'Unites, or SI in other words. The DANS LE CAS OU system of models defines the bottom units intended for seven foundation quantities because given in Stand 1 . Numerous derived products for different made quantities will be obtained from these types of base quantities.

QUANTITY

DANS LE CAS OU UNITS

SYMBOL

Length

meter

m

Mass

kilogram

kilogram

Time

second

s

Electric energy

ampere

A

Temperature

kelvin

K

Mild Intensity

fuego

cd

Quantity of Element

Mole

mol

Table one particular

1 . 2

DERIVED QUANTITIES

п‚· Derived quantities are quantities which are not base quantities.

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п‚·

The units for these made quantities are known as made units. These types of units will be formed in the base units using the regarded links between the physical quantities involved. A list of the more common derived amounts and their units is given in Table 2 .

QUANTITY

SYMBOL A

ABSTRACT -

IN TERMS OF BASE UNITS m2 m3 ms пЂ­1 ms пЂ­2 kg. m пЂ­3 kg ms пЂ­2 kg. m 2 h пЂ­2 kg. m two s пЂ­3 kg/(m. s 2 ) A. h s пЂ­1 ( a couple of kg. meters /(A 2 . s several ) A 2 t 4 kg пЂ­1 meters пЂ­1

Region V Volume level v Rate or speed a Velocity ПЃ Thickness Force Energy & Operate Power Pressure Electric Charge Frequency Electrical Resistance Capacitance F E or W P g C farrenheit R C Newton (N) Joule (J) Watt (W) Pascal (Pa) Coulomb (C) Hertz (Hz) Ohm (О©) Farad (F) Table two

1 . a few

CONVERSION of UNITS

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