gravity

Published on January 14, 2008

Author: Bianca

Source: authorstream.com

Gravity:  Gravity What is it? http://www.fi.edu/pieces/cych/apollo%2010/story/hoi/ball3.html http://www.fi.edu/pieces/cych/apollo 10/story/hoi/ball.html Gravity is…:  Gravity is… A natural force that pulls all objects toward the center of the earth. WHAT IS A FORCE?:  WHAT IS A FORCE? A pull or a push on an object Which do you think would fall first?:  Which do you think would fall first? A bouncy ball Or a marble Try It! They fall at the same rate of speed, but the marble has more mass (weight) and so gravity makes it fall harder! Gravity has a stronger force on things with more mass!:  They fall at the same rate of speed, but the marble has more mass (weight) and so gravity makes it fall harder! Gravity has a stronger force on things with more mass! It takes a force to overcome gravity!:  It takes a force to overcome gravity! Throw a bean bag in the air and then… Throw a basketball in the air. Which one was harder to throw? Slide7:  You had to use more force to throw the basketball because it has more mass (weight)

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