CHAPTER 1 statik dan dinamik

7/26/2019 CHAPTER 1 statik dan dinamik

http://slidepdf.com/reader/full/chapter-1-statik-dan-dinamik 1/19

CHAPTER 1INTRODUCTION TO STATICS



3/29/16Chapter 1 General Principles 2

Defnition

Mechanics:

Branch of physicalsciences concerned with

the state of rest or

motion of bodiessubjected to forces.




Statics Dynamics

Rigid Bodies Deformable Bodies

Solid Mechanics Fluid Mechanics

Engineering Mechanics




Rigi !o" #echanics

Statics – Bodies at rest

Dynamics – Accelerated

motion of bodies



3/29/16Chapter 1 General Principles $

!asic %&antities

'ength

› (eter

› )oot

Ti(e

› secon

#ass

› *ilogra(› sl&g

+orce

› ne,ton› po&n



Base Quantity Units

Time Second (s)

Mass Kilogram (kg)

Length Meter (m)Temperature Kelvin (K)

Amount o su!stance Mole (Mol)

"lectric current Ampere (A)

Light intensity #andela (cd)



$"%&'"$ QUAT&T&"S

Derived quantity Name Symbol

Area suare meter m*

'olume cu!ic meter m+

Speed, velocity meter per second m-s

Acceleration meter per second suared m-s*

.ave num!er reciprocal meter m/0

Mass density kilogram per cu!ic meter kg-m+

Speciic volume cu!ic meter per kilogram m+-kg

#urrent density ampere per suare meter A-m*

Magnetic ield strength ampere per meter A-mAmount/o/su!stance concentration mole per cu!ic meter mol-m+

Luminance candela per suare meter cd-m*

Mass ractionkilogram per kilogram, 1hich may !e represented !y the num!er 0

kg-kg 2 0


http://slidepdf.com/reader/full/chapter-1-statik-dan-dinamik 8/193/29/16Chapter 1 General Principles -

'ength

.eee to locate the positiono) a point in space an escrie

the si0e o) a ph"sical s"ste(


http://slidepdf.com/reader/full/chapter-1-statik-dan-dinamik 9/193/29/16Chapter 1 General Principles 9

Ti(e

Conceie as a s&ccession o)eents Concepts o) TATC

are ti(e inepenent



#ass

A propert" o) (atter " ,hich ,ecan co(pare the action o) one

o" to another This propert"(ani)ests itsel) as a graitationalattraction et,een t,o oies

an proie a &alitatie(eas&re o) the resistance o)(atter to a change in elocit"



+orce

Generall" consiere as a p&sh o)a p&ll e7erte " one o" on

another nteraction occ&rs ,henthere is irect contact et,eenthe oies Graitational8

electrical an (agnetic )orces onot re&ire irect contact +orceis characteri0e " (agnit&e8

irection an point o) application



nits

1 !asic &antities :)orce8 (ass8length8 ti(e; are relate ".e,ton<s secon la,

2 nits &se to (eas&re &antitiesare not all inepenent

3 Three o) )o&r &nits8 calle base &nits8 are aritraril" efne an the

)o&rth is erie



1 #oern ersion o) (etric s"ste(

2 !ase &nits are length8 ti(e an (ass8(eter :(;8 secon :s;8 an *ilogra(

:*g;

3 Acceleration o) grait"=

nits



4 +orce is erie &antit" (eas&re in&nit calle a newton

nits



3/29/16Chapter 1 General Principles 1$

Pref7es )or &nits




Convert 2 km/h to m/s. How many ft/s is

this?SO!"#ON$

Since 0 km 2 0333 m and 0 h 2 +433 s, the conversionactors are arranged so that a cancellation o units can !e applied5

%ecall that 0 t 2 35+3+6 m



E7a(ple

& a car is traveling at a speed o +353 m-s, is it

e7ceeding the speed limit o 86 min-h9



Conert (eters to (iles=

Conert secons to ho&rs=

smi

m

mi

s

m sm -036450

043:

335035+3-35+3 *−×=

=

×=× −−

h

s

s smi

min3543

min3543

min036450-036450 **

hmin-:4544=

CHAPTER 1 statik dan dinamik

Documents

Transcript of CHAPTER 1 statik dan dinamik