671552
Description
Flashcards by Sonja Arnold, updated more than 1 year ago
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Created by Sonja Arnold
over 10 years ago
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| Question | Answer |
| Potential Energy | Stored Energy waiting to be used later E.g. Battery |
| Gravitational Potential Energy | Ep =mass x gravity x height =mgh |
| Elastic Potential Energy | Due to compression or expansion of an elastic object E.g. Rubber band |
| Chemical Potential Energy | Stored within chemical bonds |
| Kinetic Energy | Energy an object has due to its motion Ek=1/2 (mass x speed2) |
| Work | Work Done = Force x Distance |
| Power | Work Done Power= _______________ Time |
| Newton's First Law | - An object at rest will remain the same unless acted upon by a force. - An object that is moving will continue to move at the same speed and in the same direction unless an unbalanced force acts upon it. |
| Newton's Second Law | An object will accelerate in the direction of an unbalanced force acting upon it such that: F = m x a |
| Newton's Third Law | For every action, there is an equal and opposite reaction |
| Inertia | The movement of an object to resist changes in its motion |
| Displacement | Straight line distance between the finishing and starting points |
| Scalar Quantity | Has size but not a direction E.g. 7m |
| Vector Quantity | Has both a size and a direction E.g. 7m West |
| Velocity | Is the rate at which displacement changes; Speed |
| Gradient | Line with a steep slop |
| Acceleration | The rate of change in velocity |
| Acceleration Formula | Average Accel. = change in speed ________________ time a = v - u _____ t |
| Final Speed Formula | v = u + at |
| Acceleration due to gravity | g= 10 or 9.8 |
| Average Speed Formula | v = d _____ t |
| Distance Formula | d = v x t |
| Distance vs Time Graph | |
| Displacement vs Time Graphs | |
| Speed vs Time Graphs | |
| Ticker Timers | It consists of a small electric arm with a pin or hammer on its end. The hammer vibrates up and down 50 times per second, synchronised with the alternating current of 50 Hz supplying its power. The hammer hits a piece of carbon paper that leaves a dot on a strip of paper threaded below it. When the timer is attached to an object moving in a straight line, these dots are a record of its motion |
| Fundamental Quantities | Measured; Displacement, Mass, Length & Time |
| Derived Quantities | Calculated; Velocity, Acceleration & Force |
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