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Fisika Dasar I Pert.07

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Fisika Dasar I Pert.07

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Fisika Dasar I Umiatin, M.Si ,[object Object],[object Object]
HUKUM NEWTON ,[object Object],07/03/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |
Outline ,[object Object],[object Object],[object Object],[object Object],07/03/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |
Classical Mechanics ,[object Object],[object Object],[object Object],[object Object],07/03/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |
Forces ,[object Object],[object Object],[object Object],07/03/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |
Fundamental Forces ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],07/03/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |
Newton’s First Law ,[object Object],[object Object],[object Object],[object Object],[object Object],07/03/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |
External Force: Vector addition 07/03/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |
Example of First Newton Law 07/03/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |
Inertia and Mass ,[object Object],[object Object],07/03/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |
Inertia and Mass: Two Examples 07/03/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |
Newton’s Second Law ,[object Object],[object Object],[object Object],[object Object],07/03/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |
Example of Second Newton Law 07/03/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |
The Falling Apple 07/03/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |
Newton’s Second Law ,[object Object],[object Object],07/03/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |
Units of Force ,[object Object],[object Object],07/03/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id | Units of force SI Newton (N=kg m/ s 2 ) CGS Dyne (dyne=g cm/s 2 )
Gravitational Force ,[object Object],[object Object],07/03/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |
Weight ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],07/03/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |
Dependency of Weight on Location 07/03/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |
Newton’s Third Law ,[object Object],[object Object],07/03/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |
Example: Newton’s Third Law ,[object Object],[object Object],[object Object],F 12 = -F 21 07/03/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id | 2 1 F 12 F 21
Example 1: Action-Reaction Pairs ,[object Object],[object Object],[object Object],[object Object],[object Object],N N’ 07/03/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |
Example 2: Action-Reaction pairs ,[object Object],[object Object],[object Object],[object Object],N N’ 07/03/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |
Forces Acting on an Object ,[object Object],[object Object],[object Object],N 07/03/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |
Applying Newton’s Laws ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],07/03/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |
Free Body Diagram ,[object Object],[object Object],[object Object],07/03/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |
Applying Newton’s Laws ,[object Object],[object Object],[object Object],[object Object],[object Object],07/03/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |
Equilibrium ,[object Object],[object Object],[object Object],07/03/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |
Solving Equilibrium Problems ,[object Object],[object Object],[object Object],[object Object],[object Object],07/03/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |
Example 1. Equilibrium problems Find the tension in the two wires that support the 2,5 N apple fixture in figure below 07/03/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |
Newton’s Second Law Problems ,[object Object],[object Object],[object Object],07/03/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |
Forces of Friction ,[object Object],[object Object],[object Object],07/03/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |
Characteristic of Friction ,[object Object],[object Object],[object Object],[object Object],[object Object],07/03/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |
Static Friction, ƒ s ,[object Object],[object Object],[object Object],[object Object],07/03/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |
Kinetic Friction ,[object Object],[object Object],07/03/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |
Inclined Planes ,[object Object],[object Object],07/03/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |
Example: Inclined Planes ,[object Object],[object Object],07/03/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |
Example: Inclined Planes ,[object Object],[object Object],Given: angle:  =30 ° weight: w=77.0 N Find : Tension T=? Normal n=? 07/03/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |
Connected Objects ,[object Object],[object Object],[object Object],[object Object],07/03/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |
More About Connected Objects ,[object Object],[object Object],[object Object],[object Object],[object Object],07/03/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |
Example: Connected Objects ,[object Object],[object Object],[object Object],[object Object],Problem: Two objects m 1 =4.00 kg and m 2 =7.00 kg are connected by a light string that passes over a frictionless pulley. The coefficient of sliding friction between the 4.00 kg object an the surface is 0.300. Find the acceleration of the two objects and the tension of the string. 07/03/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |
Example: Connected Objects Given: mass1: m 1 =4.00 kg mass2: m 2 =7.00 kg friction:  =0.300 Find : Tensions T=? Acceleration a=? 1. Introduce two coordinate frames : Oy: y’s are directed up Ox: x’s are directed right Solving those equations: a = 5.16 m/s 2 T = 32.4 N 07/03/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |
Terminal Speed ,[object Object],[object Object],[object Object],[object Object],07/03/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |
[object Object],[object Object],07/03/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |
TERIMA KASIH 07/03/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |

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Fisika Dasar I Pert.07

  • 1.
  • 2.
  • 3.
  • 4.
  • 5.
  • 6.
  • 7.
  • 8. External Force: Vector addition 07/03/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |
  • 9. Example of First Newton Law 07/03/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |
  • 10.
  • 11. Inertia and Mass: Two Examples 07/03/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |
  • 12.
  • 13. Example of Second Newton Law 07/03/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |
  • 14. The Falling Apple 07/03/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |
  • 15.
  • 16.
  • 17.
  • 18.
  • 19. Dependency of Weight on Location 07/03/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |
  • 20.
  • 21.
  • 22.
  • 23.
  • 24.
  • 25.
  • 26.
  • 27.
  • 28.
  • 29.
  • 30. Example 1. Equilibrium problems Find the tension in the two wires that support the 2,5 N apple fixture in figure below 07/03/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |
  • 31.
  • 32.
  • 33.
  • 34.
  • 35.
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  • 40.
  • 41.
  • 42. Example: Connected Objects Given: mass1: m 1 =4.00 kg mass2: m 2 =7.00 kg friction:  =0.300 Find : Tensions T=? Acceleration a=? 1. Introduce two coordinate frames : Oy: y’s are directed up Ox: x’s are directed right Solving those equations: a = 5.16 m/s 2 T = 32.4 N 07/03/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |
  • 43.
  • 44.
  • 45. TERIMA KASIH 07/03/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |