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Gravity and Friction Vocabulary

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1 Gravity and Friction Vocabulary
Science 8-Chapter 2 Gravity and Friction Vocabulary

2 force a push or pull on an object

3 contact force a push or pull on an object by another object that is touching it

4 noncontact force a push or pull on an object by another object without touching it

5 gravity an attractive force that exists between all objects that have mass

6 mass the amount of matter in an object

7 law of universal gravitation
all objects are attracted to each other by a gravitational force

8 weight the gravitational force exerted on an object

9 significant important, momentous

10 friction a force that resists the motion of two surfaces that are touching

11 static friction a force that prevents objects from moving, or keeps them at rest

12 sliding friction a force that prevents objects from moving, or keeps them at rest

13 fluid friction friction between a surface and a fluid

14 air resistance fluid friction between a surface and air

15 static at rest or having no motion


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