General principles
This presentation is the property of its rightful owner.
Sponsored Links
1 / 10

General Principles PowerPoint PPT Presentation


  • 47 Views
  • Uploaded on
  • Presentation posted in: General

General Principles. Modeling of problem Newton’s Law of Motion Law of Gravitation Units Vectors. Problem Solving Strategy:. Physical Model: Transformation of actual problem into simpler Assumptions Using Free Body Diagram : FBD Mathematical Model: Newton’s Law:

Download Presentation

General Principles

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


General principles

General Principles

  • Modeling of problem

  • Newton’s Law of Motion

  • Law of Gravitation

  • Units

  • Vectors


Problem solving strategy

Problem Solving Strategy:

  • Physical Model:

    • Transformation of actual problem into simpler

      • Assumptions

    • Using Free Body Diagram: FBD

  • Mathematical Model:

    • Newton’s Law:

      • F=0 and Mo=0 (coord. System)

      • Set of equations to be solved

  • Solution of Equations:

    • Computational Tools: Maple, Matlab, Prog.

  • Interpretation Results: Does answ. Makes sense?


Newton s laws of motion

Newton’s Laws of Motion

Law #1: Body is in Equilibrium

Body will remain at rest or continue to move with same speed (accel.=0) and direction unless unbalance force is acted on body or particle.


Newton s law of motion

Newton’s Law of Motion

Law #2: Non-equilibrium

Change of motion of a body is proportional to the next force imposed on the body and is in direction of net force.


Newton s law of motion1

Newton’s Law of Motion

  • Law #3: Action & Reaction

    If one body exerts a force on a second body, then second body exerts a force on the first body that is equal in magnitude, opposite in direction and collinear (same line of action).


Law 4 law of gravitation

Law#4: Law of Gravitation

  • Any two bodies are attracted to each other with a force whose magnitude is proportional to the product of their gravitational masses and inversely proportional to the square of the distance between them.

m

F

M

F

r


Activity 1 weight

Activity 1: Weight

  • If an object has a mass m=50Kg find the weight of object at surface of earth, moon and sun?

    G = 66.73x10-12 (m3/Kg/s2)

    Universal gravitational const.

    Given:

    • Mass of earth= 5.976x1024 Kg

    • Mass of moon= 7.35x1022 Kg

    • Mass of sun=1.99x1030 Kg

    • Radius of earth=6.371x106 m

    • Radius of Moon: 1.738x10^6 m

    • Radius of Sun: 6.96x10^8 m


Weight mass

Weight & Mass:

  • Weight:

    where: and on earth surface:

    g= 9.807m/s2 (SI) or g= 32.17 ft/s2 (US)

  • Mass:


Units

Units

Tables 1.6 and 1.7 in book


Percent error

Percent Error

A = Value to be Compared

B = Reference Value

% Error = (A-B)/B (100%)


  • Login