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7Sci CH1
7th Science CH1 Forces and Pressure
| Term | Definition |
|---|---|
| Action force | The force you exert when you push on something every action force as an equal and opposite reaction force that occurs at exactly the same time. |
| Balanced force | Forces whose actions cancel each other out |
| Buoyant force | Upward force exerted by water equal to the weight of water the object is displacing; |
| Force | A push or pull,more force is needed to move a large object than a small object, force equals mass times acceleration |
| Inertia | Tendency of an object to resist changes in motion; objects with large mass have greater inertia and resist acceleration; as the object’s inertia increases, the force needed to accelerate that object also increases |
| Newton | Standard unit of force, abbreviated N; 1 newton of force equals the amount of force needed to accelerate a 1-kg mass at 1 m/s2 |
| Pressure | The force or weight acting on each unit of area; calculated by dividing the weight of an object by the surface area the object occupies |
| Reaction force | The force that pushes back on you when you push on something, action-reaction forces occur in pairs, exert equal and opposite forces and happen at exactly the same moment |
| Weight | The force by which an object is pulled by Earth’s gravitational force, calculated by multiplying acceleration due to gravity times the object’s mass |
Created by:
djhockett5
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