NEWTON'S UNIVERSAL GRAVITATION LAW by Lizelle Swanepoel https://padlet.com/lizellexs/ptsc082q6md8xfyg en-us 2021-04-27 06:06:47 UTC 2025-04-24 13:02:16 UTC hello@padlet.com https://padlet-assets.s3.amazonaws.com/icons/Planets.png INTRODUCTION lizellexs https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896406 2021-04-27 06:06:47 UTC https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896406 THE STORY OF GRAVITY: Copernicus, Galileo, Kepler, Newton, Einstein lizellexs https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896412 Copernicus, Galileo, Kepler, Newton, Einstein.]]> 2021-04-27 06:06:47 UTC https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896412 Galileo’s experiment on the moon in 1971 - feather hammer drop lizellexs https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896413 2021-04-27 06:06:47 UTC https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896413 Galileo died in 1642, the year that Newton was born. lizellexs https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896415 2021-04-27 06:06:47 UTC https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896415 GALILEO VS. NEWTON VS. EINSTEIN lizellexs https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896418 Famous Ball-and-Feather Experiment]]> 2021-04-27 06:06:47 UTC https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896418 The Law of Universal Gravitation lizellexs https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896421 2021-04-27 06:06:47 UTC https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896421 DEFINITIONS lizellexs https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896423
  • Newton's Law of Universal Gravitation states:
    • Each body in the universe attracts every other body with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centres. 
    • Weight
    Weight as the gravitational force the Earth exerts on any object on or near its surface 
    ]]>     2021-04-27 06:06:47 UTC https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896423     lizellexs https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896425 2021-04-27 06:06:47 UTC https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896425 Universal Gravitation formula lizellexs https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896427 WHERE:
    F = force
    m = mass
    r = distance two objects are apart (distance between their centers)
    G = Universal gravitational constant (Newton's constant) = 6.67×10-11 N m2 kg-2

    ]]>     2021-04-27 06:06:47 UTC https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896427     GRAPHS lizellexs https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896429 2021-04-27 06:06:47 UTC https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896429 EFFECT OF CHANGING DISTANCE lizellexs https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896431 2021-04-27 06:06:47 UTC https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896431 CAVENDISH EXPERIMENT to measure “G” lizellexs https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896432 Performed in 1797–98 by British scientist Lord Henry Cavendish]]> 2021-04-27 06:06:47 UTC https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896432 LORD HENRY CAVENDISH - the man who determined the value for "G" lizellexs https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896436 2021-04-27 06:06:47 UTC https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896436 lizellexs https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896437 2021-04-27 06:06:47 UTC https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896437 SUPERMAN, KRYPTON AND GRAVITY lizellexs https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896438 Superman's strength must be partly attributed to the gravitational field of his home planet, Krypton. 

    • The people of Krypton evolved to stand, walk, and lift ordinary objects in Krypton's strong gravitational field. 
    • When Superman came to Earth, he found that his Kryptonian physique was over-designed. 
    ]]>     2021-04-27 06:06:47 UTC https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896438     SIMPLE PROBLEM SOLVING ON UNIVERSAL GRAVITATION lizellexs https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896440 2021-04-27 06:06:47 UTC https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896440 FURTHER PROBLEMS AND WORKED SOLUTIONS lizellexs https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896442 2021-04-27 06:06:47 UTC https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896442 Proportionally With Newton's Equation lizellexs https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896444 PRACTICE PROBLEM:
    Suppose two objects attract each other with a gravitational force of 16 N. 
    1. If the mass of both objects was tripled and the distance between the objects was doubled, what would be the new force of attraction between the two objects?
    2. What is the ratio of the forces  Fnew / Foriginal ?

    ANSWER:
    1. Fnew = G(3m x 3M/ (2r)2   =  9GmM /(4 r2)   =  9/4 Foriginal
    2. Fnew / Foriginal = 9/4

    ]]>     2021-04-27 06:06:47 UTC https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896444     KEY EXAMPLES lizellexs https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896447 2021-04-27 06:06:47 UTC https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896447 lizellexs https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896449 2021-04-27 06:06:47 UTC https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896449 GRAVITATIONAL FIELD STRENGTH lizellexs https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896451 2021-04-27 06:06:47 UTC https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896451 CALCULATING "g" of any planet lizellexs https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896453 2021-04-27 06:06:47 UTC https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896453 lizellexs https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896454 2021-04-27 06:06:47 UTC https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896454 lizellexs https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896456 2021-04-27 06:06:47 UTC https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896456 lizellexs https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896458 2021-04-27 06:06:47 UTC https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896458 WATCH THIS: lizellexs https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896460 2021-04-27 06:06:47 UTC https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896460 Why gravity is not a force lizellexs https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896462 2021-04-27 06:06:47 UTC https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896462 WHAT IS GRAVITATIONAL FORCE? lizellexs https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896463 2021-04-27 06:06:47 UTC https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896463 ELECTROSTATIC VS GRAVITATIONAL FIELDS IN ACTION - BUILD YOUR OWN PARTICLE ACCELERATOR! lizellexs https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896468 2021-04-27 06:06:47 UTC https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896468 ANSWERS TO ALL EXAMPLES AND EXERCISE QUESTIONS lizellexs https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896471 2021-04-27 06:06:47 UTC https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896471 FINAL PRACTICE lizellexs https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896473 2021-04-27 06:06:47 UTC https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896473 ANSWERS (FINAL PRACTICE) lizellexs https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896475 6.1
    Every particle in the universe attracts every other particle with a force which is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centres.
    6.2
    At the point where the gravitational force on Apollo towards Earth is equal to the gravitational force on Apollo towards the Moon, the forces are equal but act in opposite directions and BALANCE. The resultant or net force on Apollo will then be the vector sum of the opposing forces which is zero. ]]>     2021-04-27 06:06:47 UTC https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896475     lizellexs https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896476 2021-04-27 06:06:47 UTC https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896476 lizellexs https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896477 6.4
    In the vacuum of space on a spacewalk (with no air molecules or supportive surfaces), the astronaut is acted upon by the force of gravity only and are in free fall towards Earth (at the acceleration of gravity, together with the spacecraft) but continue to miss the earth. Since the astronaut is therefore in ORBIT he appears weightless. ]]>     2021-04-27 06:06:47 UTC https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896477     lizellexs https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896478 2021-04-27 06:06:47 UTC https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896478 lizellexs https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896479 2021-04-27 06:06:47 UTC https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/1462896479 lizellexs https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/2561943329 2023-04-20 14:29:44 UTC https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/2561943329 GALILEO'S EXPERIMENT lizellexs https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/2561978382 2023-04-20 14:39:01 UTC https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/2561978382 lizellexs https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/2561982216 2023-04-20 14:40:24 UTC https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/2561982216 lizellexs https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/2959753714 2024-04-18 05:36:25 UTC https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/2959753714 Newton’s four Laws lizellexs https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/2959755841 2024-04-18 05:38:06 UTC https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/2959755841 lizellexs https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/3091806623 2024-08-28 07:38:49 UTC https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/3091806623 lizellexs https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/3091813795 2024-08-28 07:44:54 UTC https://padlet.com/lizellexs/ptsc082q6md8xfyg/wish/3091813795