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The Role of Gravity in Planets, Stars, and the Solar System

Understand the force of gravity and its impact on celestial bodies. Explore Newton's hypothesis and the law of universal gravitation. Learn about mass, weight, and their relationship to gravity.

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The Role of Gravity in Planets, Stars, and the Solar System

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  1. CH 12 SEC 2 GRAVITY AND MOTION

  2. GOAL/PURPOSE • TO UNDERSTAND THE ROLE GRAVITY PLAYS ON THE PLANETS, STARS AND THE SOLAR SYSTEM

  3. FORCE AND NEWTON • KEY – SIR ISAAC NEWTON WAS AN ENGLISH SCIENTIST 1666 WHO WATCHED AN APPLE FALL FROM A TREE. • KEY- NEWTON REALIZED THE FORCE ACTING BETWEEN EARTH AND THE APPLE IS THE SAME FORCE ACTING BETWEEN THE EARTH AND THE MOON THAT KEEPS THE MOON IN ORBIT. • FORCE- IS A PUSH OR A PULL

  4. GRAVITY • KEY- NEWTON HYPOTHESIZED THAT THE FORCE THAT PULLS THE APPLE DOWN TO THE GROUND ALSO PULLS THE MOON TOWARD THE EARTH. • GRAVITY- IS THE FORCE THAT ATTRACTS ALL OBJECTS TOWARD EACH OTHER • KEY- NEWTON WAS THE FIRST TO REALIZE THAT GRAVITY OCCURS EVERYWHERE. • LAW OF UNIVERSAL GRAVITATION- STATES THAT EVERY OBJECT IN THE UNIVERSE ATTRACTS EVERY OTHER OBJECT IN THE UNIVERSE

  5. GRAVITY • KEY- THE FORCE OF GRAVITY IS MEASURED IN NEWTON'S • KEY- THE STRENGTH OF GRAVITY BETWEEN TWO OBJECTS DEPENDS ON TWO FACTORS: THE MASSES OF THE OBJECTS AND THE DISTANCE BETWEEN THEM.

  6. GRAVITY • http://www.youtube.com/watch?v=ufsrgE0BYf0 • http://www.imdb.com/title/tt1454468/

  7. Mass vs distance

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  9. GRAVITY, MASS AND WEIGHT • KEY- GRAVITY DEPENDS ON THE MASSES OF AN OBJECT • MASS- IS THE AMOUNT OF MATTER IN AN OBJECT. • KEY- THE MORE MASS AN OBJECT HAS THE GREATER THE GRAVITATIONAL FORCE. • EX- EARTH VS A BOOK VS YOU

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  11. WEIGHT- IS THE FORCE OF GRAVITY ON AN OBJECT • KEY- MASS WHICH DOES NOT CHANGE WEIGHT CAN CHANGE FROM LOCATION TO LOCATION • EX- MOON WEIGHT IS 1/6 THAT OF YOUR EARTH WEIGHT

  12. Answer Questions • P. 477 • 1ABC • 2ABC

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