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Science
| Term | Definition |
|---|---|
| Mass | How much matter is in an object |
| Velocity | the rate of change of distance, in a specific direction |
| volume | how much space an object occupies |
| density | the measure of the mass of a substance per unit volume |
| force | a push or a pull which can change an objects motion or shape |
| inertia | the tendency of an object to remain in its current state of motion |
| momentum | the measurement of the tendency of a moving object to remain in its current constant state of motion |
| All objects have... | inertia |
| momentum is a measure of | the inertia of objects in motion |
| mass is a measure of | the inertia of stationary objects |
| speed up | accelerate |
| slow down | decelerate |
| Fa (force applied) | the force applied to an object by another object |
| Fg (gravitational force) | the force that pull object towards the centre of the Earth |
| W (weight) | the amount of gravity pulling a mass down (measured in Newtons) |
| Ffr (friction) | a force that opposes motion when two surfaces are in contact |
| Fair (air resistance) | the opposing force exerted on an objected by the air |
| Fn (normal force) | the supporting force exerted usually upward on an object that is in contact with another stable contact |
| Fb (buoyant force) | the upward pressure exerted on an object by a fluid |
| F (tension force) | the force transmitted through a rope, string or wire when pulled |
| Contact force | a force applied onto another object by contact or touching *wind is a contact force* |
| Non-contact force | a natural force- happens without contact or touching *gravity* |
| Velocity-time graphs What is on the left and what is on the right? | Left- Velocity Right- time |
| Newtons first law | All objects wish to maintain their current state of motion unless acted upon by an unbalanced force |
| net force | sum of all of the forces acting on an object, taking direction into consideration |
| changes in motion result from... | action in net forces |
| if an object in in constant motion | it has a zero net force |
| 3 rules about a free body diagram | 1. simple object 2. arrows come from the inside 3. label arrows with forces and amount (N) |
| v= | d/t |
| p= | mv |
| Δp= | mv-mu =pf-pi |
Created by:
s108374
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