LAW OF UNIVERSAL GRAVITATION by Lizelle Swanepoel https://padlet.com/lizellexs/a7axjs3lr31z en-us 2018-06-06 05:53:46 UTC 2023-02-07 04:54:08 UTC hello@padlet.com https://padlet-assets.s3.amazonaws.com/icons/Planets.png WHAT IS GRAVITATIONAL FORCE? lizellexs https://padlet.com/lizellexs/a7axjs3lr31z/wish/265796738 2018-06-06 05:55:08 UTC https://padlet.com/lizellexs/a7axjs3lr31z/wish/265796738 GALILEO VS. NEWTON VS. EINSTEIN lizellexs https://padlet.com/lizellexs/a7axjs3lr31z/wish/265796887 Famous Ball-and-Feather Experiment]]> 2018-06-06 05:57:32 UTC https://padlet.com/lizellexs/a7axjs3lr31z/wish/265796887 FORMAL DEFINITION lizellexs https://padlet.com/lizellexs/a7axjs3lr31z/wish/265797014 Newton's Law of Universal Gravitation states:
Every particle with mass 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.]]> 2018-06-06 05:59:17 UTC https://padlet.com/lizellexs/a7axjs3lr31z/wish/265797014 Universal Gravitation formula lizellexs https://padlet.com/lizellexs/a7axjs3lr31z/wish/265798140 WHERE:
F = force
m = mass
r = distance two objects are apart (distance between their centers)
G = Universal gravitational constant (Newton's constant) = 6.673×10-11 N m2 kg-2

]]> 2018-06-06 06:13:06 UTC https://padlet.com/lizellexs/a7axjs3lr31z/wish/265798140 EFFECT OF CHANGING DISTANCE lizellexs https://padlet.com/lizellexs/a7axjs3lr31z/wish/265798534 2018-06-06 06:17:27 UTC https://padlet.com/lizellexs/a7axjs3lr31z/wish/265798534 SIMPLE PROBLEM SOLVING ON UNIVERSAL GRAVITATION lizellexs https://padlet.com/lizellexs/a7axjs3lr31z/wish/265798948 2018-06-06 06:20:47 UTC https://padlet.com/lizellexs/a7axjs3lr31z/wish/265798948 KEY EXAMPLES lizellexs https://padlet.com/lizellexs/a7axjs3lr31z/wish/266788746 2018-06-12 10:48:20 UTC https://padlet.com/lizellexs/a7axjs3lr31z/wish/266788746 FURTHER PROBLEMS AND WORKED SOLUTIONS lizellexs https://padlet.com/lizellexs/a7axjs3lr31z/wish/366275492 2019-06-07 04:44:10 UTC https://padlet.com/lizellexs/a7axjs3lr31z/wish/366275492 The Law of Universal Gravitation lizellexs https://padlet.com/lizellexs/a7axjs3lr31z/wish/604962317 In a nutshell ]]> 2020-06-01 14:59:33 UTC https://padlet.com/lizellexs/a7axjs3lr31z/wish/604962317 RECAP lizellexs https://padlet.com/lizellexs/a7axjs3lr31z/wish/605351654 2020-06-01 17:56:12 UTC https://padlet.com/lizellexs/a7axjs3lr31z/wish/605351654 ALBERT EINSTEIN - GRAVITY AND SPACE-TIME lizellexs https://padlet.com/lizellexs/a7axjs3lr31z/wish/605385937 In 1915, Einstein's Theory of Relativity described gravity as mass warping time and space.]]> 2020-06-01 18:15:32 UTC https://padlet.com/lizellexs/a7axjs3lr31z/wish/605385937 THE STORY OF GRAVITY STARTS WITH THESE SCIENTIFIC GIANTS lizellexs https://padlet.com/lizellexs/a7axjs3lr31z/wish/605454624 Copernicus, Galileo, Kepler, Newton, Einstein.]]> 2020-06-01 18:54:16 UTC https://padlet.com/lizellexs/a7axjs3lr31z/wish/605454624 Stephen Hawking and Einstein lizellexs https://padlet.com/lizellexs/a7axjs3lr31z/wish/605488050
Stephen Hawking was a brilliant British physicist who also researched gravity and discovered Hawking radiation from black holes.  ]]> 2020-06-01 19:11:55 UTC https://padlet.com/lizellexs/a7axjs3lr31z/wish/605488050 Stephen Hawking lizellexs https://padlet.com/lizellexs/a7axjs3lr31z/wish/605515793
  • Born 8 January 1942, on the 300th anniversary of Galileo's death. 
  • Died 14 March 2018, on the anniversary of Einstein's birth.  
    • ]]>     2020-06-01 19:27:11 UTC https://padlet.com/lizellexs/a7axjs3lr31z/wish/605515793     Galileo died in 1642, the year that Newton was born. lizellexs https://padlet.com/lizellexs/a7axjs3lr31z/wish/605557422 2020-06-01 19:51:00 UTC https://padlet.com/lizellexs/a7axjs3lr31z/wish/605557422 CAVENDISH EXPERIMENT to measure big "G" lizellexs https://padlet.com/lizellexs/a7axjs3lr31z/wish/605666427
  • G = The Universal Gravitation Constant
  • Performed in 1797–98 by British scientist Lord Henry Cavendish
  • Click link below to watch
    • ]]>     2020-06-01 20:58:34 UTC https://padlet.com/lizellexs/a7axjs3lr31z/wish/605666427     SUPERMAN, KRYPTON AND GRAVITY lizellexs https://padlet.com/lizellexs/a7axjs3lr31z/wish/605695636 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 sort of over-designed. 
    • He could "leap over tall buildings in a single bound", for example. Let's see Superman in action:
    ]]>     2020-06-01 21:19:30 UTC https://padlet.com/lizellexs/a7axjs3lr31z/wish/605695636     GRAPHS lizellexs https://padlet.com/lizellexs/a7axjs3lr31z/wish/605747603 2020-06-01 22:03:49 UTC https://padlet.com/lizellexs/a7axjs3lr31z/wish/605747603 lizellexs https://padlet.com/lizellexs/a7axjs3lr31z/wish/605751990 2020-06-01 22:07:31 UTC https://padlet.com/lizellexs/a7axjs3lr31z/wish/605751990 lizellexs https://padlet.com/lizellexs/a7axjs3lr31z/wish/605764640 2020-06-01 22:19:56 UTC https://padlet.com/lizellexs/a7axjs3lr31z/wish/605764640 lizellexs https://padlet.com/lizellexs/a7axjs3lr31z/wish/605771598 2020-06-01 22:26:52 UTC https://padlet.com/lizellexs/a7axjs3lr31z/wish/605771598 GRAVITATIONAL FIELD STRENGTH lizellexs https://padlet.com/lizellexs/a7axjs3lr31z/wish/605778630 2020-06-01 22:33:48 UTC https://padlet.com/lizellexs/a7axjs3lr31z/wish/605778630 CALCULATING "g" of any planet lizellexs https://padlet.com/lizellexs/a7axjs3lr31z/wish/605784114 2020-06-01 22:39:03 UTC https://padlet.com/lizellexs/a7axjs3lr31z/wish/605784114 lizellexs https://padlet.com/lizellexs/a7axjs3lr31z/wish/605784612 2020-06-01 22:39:35 UTC https://padlet.com/lizellexs/a7axjs3lr31z/wish/605784612 lizellexs https://padlet.com/lizellexs/a7axjs3lr31z/wish/605784926 2020-06-01 22:39:56 UTC https://padlet.com/lizellexs/a7axjs3lr31z/wish/605784926 lizellexs https://padlet.com/lizellexs/a7axjs3lr31z/wish/605796930 2020-06-01 22:52:17 UTC https://padlet.com/lizellexs/a7axjs3lr31z/wish/605796930 INTRODUCTION TO NEWTON'S LAW OF UNIVERSAL GRAVITATION lizellexs https://padlet.com/lizellexs/a7axjs3lr31z/wish/606640421 2020-06-02 11:05:13 UTC https://padlet.com/lizellexs/a7axjs3lr31z/wish/606640421 PROPORTIONALITY IN THE UNIVERSAL GRAVITATION EQUATION lizellexs https://padlet.com/lizellexs/a7axjs3lr31z/wish/606655703 2020-06-02 11:16:52 UTC https://padlet.com/lizellexs/a7axjs3lr31z/wish/606655703 Galileo’s experiment on the moon in 1971 - feather hammer drop lizellexs https://padlet.com/lizellexs/a7axjs3lr31z/wish/608175100 2020-06-03 05:46:14 UTC https://padlet.com/lizellexs/a7axjs3lr31z/wish/608175100 WORKED EXAMPLES lizellexs https://padlet.com/lizellexs/a7axjs3lr31z/wish/643767178 2020-06-30 08:17:45 UTC https://padlet.com/lizellexs/a7axjs3lr31z/wish/643767178 VIDEO LESSON - FULL TOPIC lizellexs https://padlet.com/lizellexs/a7axjs3lr31z/wish/643790987 Click on the video below.
    Links to lesson:
    • https://youtu.be/n_fEfKu2Fo4
    • https://drive.google.com/file/d/1ZALKIu7rYq3JnkJd5evBRosqU66JkJtz/view?usp=sharing
    ]]>     2020-06-30 08:48:15 UTC https://padlet.com/lizellexs/a7axjs3lr31z/wish/643790987     WATCH THIS: lizellexs https://padlet.com/lizellexs/a7axjs3lr31z/wish/648093667 2020-07-06 06:52:58 UTC https://padlet.com/lizellexs/a7axjs3lr31z/wish/648093667 ELECTROSTATIC VS GRAVITATIONAL FIELDS IN ACTION - BUILD YOUR OWN PARTICLE ACCELERATOR! lizellexs https://padlet.com/lizellexs/a7axjs3lr31z/wish/662318109 2020-07-25 10:30:55 UTC https://padlet.com/lizellexs/a7axjs3lr31z/wish/662318109 ANSWERS (FINAL PRACTICE) lizellexs https://padlet.com/lizellexs/a7axjs3lr31z/wish/761170461 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. ]]>     2020-09-19 18:11:27 UTC https://padlet.com/lizellexs/a7axjs3lr31z/wish/761170461     lizellexs https://padlet.com/lizellexs/a7axjs3lr31z/wish/761188872 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. ]]>     2020-09-19 18:35:19 UTC https://padlet.com/lizellexs/a7axjs3lr31z/wish/761188872     lizellexs https://padlet.com/lizellexs/a7axjs3lr31z/wish/761190807 2020-09-19 18:37:38 UTC https://padlet.com/lizellexs/a7axjs3lr31z/wish/761190807 FINAL PRACTICE lizellexs https://padlet.com/lizellexs/a7axjs3lr31z/wish/761219549 2020-09-19 19:15:16 UTC https://padlet.com/lizellexs/a7axjs3lr31z/wish/761219549 lizellexs https://padlet.com/lizellexs/a7axjs3lr31z/wish/761223426 2020-09-19 19:20:06 UTC https://padlet.com/lizellexs/a7axjs3lr31z/wish/761223426 lizellexs https://padlet.com/lizellexs/a7axjs3lr31z/wish/761230941 2020-09-19 19:30:34 UTC https://padlet.com/lizellexs/a7axjs3lr31z/wish/761230941 GALILEO VS. NEWTON VS. EINSTEIN https://padlet.com/lizellexs/a7axjs3lr31z/wish/1439901744 Famous Ball-and-Feather Experiment]]> 2021-04-20 20:28:17 UTC https://padlet.com/lizellexs/a7axjs3lr31z/wish/1439901744 GRAVITATIONAL FORCE IS THE WEAKEST OF ALL OF NATURE'S FUNDAMENTAL FOURCES https://padlet.com/lizellexs/a7axjs3lr31z/wish/1439942105 2021-04-20 20:41:17 UTC https://padlet.com/lizellexs/a7axjs3lr31z/wish/1439942105 LORD HENRY CAVENDISH https://padlet.com/lizellexs/a7axjs3lr31z/wish/1439962540 2021-04-20 20:48:17 UTC https://padlet.com/lizellexs/a7axjs3lr31z/wish/1439962540 SUMMARY VIDEO https://padlet.com/lizellexs/a7axjs3lr31z/wish/1449542501 2021-04-22 21:58:07 UTC https://padlet.com/lizellexs/a7axjs3lr31z/wish/1449542501 Why gravity is not a force https://padlet.com/lizellexs/a7axjs3lr31z/wish/1462892672 2021-04-27 06:05:22 UTC https://padlet.com/lizellexs/a7axjs3lr31z/wish/1462892672