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Frictions
Question | Answer |
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Friction | The force that one surface exerts on another when the two surfaces rub against each other. |
Static Friction | Friction that acts an objects that are not moving. |
Sliding Friction | Friction that occurs when one solid surface slides over another. |
Rolling Friction | Friction that occurs when an object rolls over a surface. |
Fluid Friction | Friction that occurs as an object moves through a fluid. |
Gravity | The force that pulls objects toward each other. |
Mass | A measure of how much matter is in an object. |
Weight | A measure of the force of gravity on an object. |
Free Fall | The motion of a falling object when the only force acting on its gravity. |
Air Resistance | The fluid friction experienced by objects fall through the air. |
Projectile | An object that is thrown. |
Compression | The part of a longitudinal wave where the particles of the medium are close together. |
Tension | Stress that stretches rock so that it becomes thinner in the middle. |