Term
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Definition
| Distance moved in a given time In science the time unit is usually a second. Therefore speeds are measured in metres per second (how many meters travelled in one second). |
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Term
| What is the equation used to calculate speed? |
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Definition
| speed = distance travelled/time taken
speed is measured in metres per second (m/s)
distance in metres (m)
time in seconds (s) NOTE: the abbreviation for seconds is 's' NOT secs!!!
Leave sex to the biologists! |
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Term
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Definition
| The vector form of speed. |
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Term
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Definition
| A vector has magnitude (in other words - size) AND direction. This makes it different from a scalar quantity which only has size! |
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Term
| What is a scalar quantity? |
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Definition
| One that only has magnitude (size). It differes from a vector which has direction associated with it too. |
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Term
| What equation do you use to calculate velocity? |
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Definition
| velocity = displacement (distance moved in a given direction)/time taken
velocity is measured in metres per second (m/s)
distance in metres (m)
time in seconds (s) NOTE: the abbreviation for seconds is 's' NOT secs!!!
Leave sex to the biologists! |
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Term
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Definition
| The vector version of distance. It is the distance moved in a particular direction. |
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Term
| [image]
What does this signify? |
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Definition
| An object that is stationary - the object stays at position 'x' all of the time!
gradient = 0 m/s so velocity = 0 m/s |
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Term
| What would a displacement/time graph indicating a constant velocity look like? |
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Definition
| [image]
The steeper the line the bigger the gradient and therefore the greater the velocity. |
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Term
| Sketch a displacement/time graph that shows an object moving at decreasing speed |
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Definition
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Term
| [image]
What does this signify? |
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Definition
| It moves off at a constant speed and then reverses at a constant speed! The negative gradient indicates it is moving in the opposite direction (moving 'backwards') - so it finishes up where it started! |
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Term
| Sketch a velocity/time graph to show constant velocity. |
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Definition
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Term
| Sketch a velocity/time graph to show a stationary object. |
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Definition
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Term
| Sketch a velocity/time graph to show constant acceleration. |
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Definition
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Term
| What does the area under a velocity/time graph represent? |
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Definition
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Term
| Sketch a graph to show decreasing acceleration. |
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Definition
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Term
| What is the equation for acceleration? |
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Definition
| Change in velocity/time taken
velocity is measured in metres per second (m/s)
time is measured in seconds (s)
acceleration is measured in metres per second squared (m/s2 OR ms-2). |
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Term
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Definition
| Acceleration is a change in velocity. The bigger the change in a given time the higher the acceleration. It takes a force to produce aceleration, so acceleration is evidence that a force is acting. |
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Term
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Definition
| Negative acceleration - it is a decreasing change in velocity. |
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Term
| What is the abbreviation for acceleration? |
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Definition
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Term
| What is the abbreviation for velocity? |
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Definition
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Term
| What is the abbreviation for time? |
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Definition
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Term
| What is the abbreviation for distance? |
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Definition
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Term
| What is the abbreviation for displacement? |
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Definition
| s (small case) - don;t ask me why - it just is and you need to know that at GCSE and above. |
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Term
| What is the abbreviation for speed? |
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Definition
| Please don't abbreviate it to s - just write the word out! |
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Term
| What is the unit for velocity? |
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Definition
| velocity is measured in metres per second (m/s) |
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Term
| What is the unit for acceleration? |
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Definition
| acceleration is measured in metres per second squared (m/s2 OR ms-2) |
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