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AN#Sci#2011#2#Def
Science Topic 2 Definitions 2011
Question | Answer |
---|---|
Mass | The amount of matter in something |
Weight | The force of gravity pulling on matter |
Force | A push, pull or twist applied to an object |
Acceleration | The rate at which an object changes speed |
Net force | The directional sum of all forces acting on an object |
Friction | A rubbing force that slows moving objects |
Distance | How far it is between 2 objects |
Speed | How quickly an object is moving |
Time | How long it takes between 2 events |
Average speed | The total distance traveled divided by the total time taken |
Velocity | Speed in a given direction |
Inertia | The tendency of an object to stay still or keep moving |
Momentum | The product of mass and velocity |
Newton's Laws | The 3 laws proposed by Sir Isaac Newton that describe motion |
Data | Information in numerical form |
Graph | Visual way of displaying data |
Ticker timer | Leaves dots on a paper tape to record motion |
Circular motion | Motion of an object round and round |
Harmonic | Motion of an object going to and fro |
Pendulum | Swinging object that can be used to measure time |
Terminal velocity | Air resistance which slows falling objects near earth |
Constant speed | Same time to travel same distance |
Reaction time | Time taken for driver to react to danger (moving from accelerator to the brake) |
Reaction distance | Distance car travels during reaction time |
Braking distance | Distance taken for car to stop when brakes are applied |
Stopping distance | Total distance taken to stop |