Mechanics: Motion, Forces, Energy and Gravity, from Particles to Planets
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list 8 séquences
assignment Niveau : Introductif
chat_bubble_outline Langue : Anglais
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Les infos clés

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timer 8 heures de cours

En résumé

Most of the phenomena in the world around you are, at the fundamental level, based on physics, and much of physics is based on mechanics. Mechanics begins by quantifying motion, and then explaining it in terms of forces, energy and momentum. This allows us to analyse the operation of many familiar phenomena around us, but also the mechanics of planets, stars and galaxies. This on-demand course is recommended for senior high school and beginning university students and anyone with a curiosity about basic physics. (The survey tells us that it's often used by science teachers, too.) The course uses rich multimedia tutorials to present the material: film clips of key experiments, animations and worked example problems, all with a friendly narrator. You'll do a range of interesting practice problems, and in an optional component, you will use your ingenuity to complete at-home experiments using simple, everyday materials. You will need some high-school mathematics: arithmetic, a little algebra, quadratic equations, and the sine, cosine and tangent functions from trigonometry. The course does not use calculus. However, we do provide a study aid introducing the calculus that would accompany this course if it were taught in a university. By studying mechanics in this course, you will understand with greater depth many of the wonders around you in everyday life, in technology and in the universe at large. Meanwhile, we think you'll have some fun, too.

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Le programme

  • Week 1 - Introduction and Basic Tools
    This introductory section covers some basic tools you will need to solve some of the physics problems we will encounter later.
  • Week 2 - Velocity and Acceleration
    Here we introduce kinematics, in which we describe and quantify movement of objects through space over time. Motion is so important to mechanics (and most of physics) that we'll spend a few weeks establishing the tools and techniques we'll need. We'll leave ex...
  • Week 3 - Motion in Two Dimensions
    Here we look at kinematics in two-dimensions – specifically, projectiles and objects in circular motion.
  • Week 4 - Newton's Laws of Motion
    After describing and quantifying motion (weeks 2 and 3), we now start explaining it with Newton's three laws of motion. Knowledge of Newton's laws and the ability to apply them to various situations will allow us to explain much of the motion we observe in the...
  • Week 5 - Weight, Friction and Spring Forces
    We return to the difference between weight and mass. We introduce Hooke's law for elastic deformations. We consider forces between objects in contact and (for convenience) resolve them into their normal and frictional components – and as usual give you some pr...
  • Week 6 - Work, Energy and Power
    In week 6 we explore work and energy, then power – the rate of doing work. We'll use work and Newton's second law to derive the quantity called kinetic energy. Looking at where work comes from, we'll distinguish two sorts of force – conservative and non-conser...
  • Week 7 - Momentum and Collisions
    It’s time for some smashing fun! Once we've defined momentum we'll use momentum to analyse elastic and inelastic collisions. Stand by for hammers, skateboards, car crashes and a bed of nails…
  • Week 8 - Gravity
    For as long as history – and probably much longer – people have stared at the planets and stars and wondered. Why do they shine? What keeps them moving? Why don't they fall down? So next is gravity – and how it runs the solar system, the galaxy and the univers...

Les intervenants

Prof. Joe Wolfe
School of Physics, Faculty of Science

Dr Elizabeth J. Angstmann
First Year Physics Director
School of Physics, Faculty of Science

Mr Sebastian Fricke
Teacher and laboratory manager
School of Physics, Faculty of Science


Le concepteur

UNSW Australia (The University of New South Wales)
UNSW Australia, based in Sydney, was established in 1949 and is one of Australia’s leading research and teaching universities with more than 50,000 students from over 120 countries. UNSW aspires to provide students with an outstanding educational experience, which both reflects our strong traditions of excellence, innovation and social justice, and builds on our strengths in scientific, technological and professional disciplines.

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