3071934
| Questão | Responda |
| Forces can... | make something move, change direction, change it's shape, |
| Types of forces | Contact force, gravity, friction, air resistance, electrostatic, Magnetism |
| A force is... | A push or a pull |
| Contact forces are | friction, air resistance and contact force |
| non-contact forces are... | Gravity, magnetism and electrostatic |
| Friction definition | Friction is a force that opposes movement |
| Friction happens because.. | all the little bumps on 2 objects interlock |
| In what situations are friction useful? | filing nails, walking, writing and erasers |
| In what situations are friction not useful? | Going down a slide, race car drivers, engines and moving objects. |
| Gravity definition | Gravity is the invisible forcefield around the earth |
| The gravity on earth is... | 9.8 |
| Gravity is stronger | the closer you are to the object and the larger the object is |
| If forces are un-balanced | an object moves |
| If forces are balanced... | an object moves |
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