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Science matters!
| force | a push or pull on an object. [force is what sets matter in motion. forces cause an object to move, stop, or change direction.] (examples: pulling a cart, kicking a soccer ball, catching a baseball, hitting a volleyball) |
| 3 types of force | friction, magnetism, gravity |
| friction | a force that acts against [opposes] motion when two surfaces rub against each other. (example: rubbing hands together) |
magnetism | the magnetic force of pushing [repulsion] or pulling [attraction] between negative (-) or positive (+) poles of magnets |
| gravity | a force that pulls [attracts] objects with mass towards one another (example: tossing a ball into the air gravity: pulls the ball towards earth, moon’s gravity: pulls on earth creating tides) |