P5-Vectors

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  • Created by: Lauren
  • Created on: 10-03-13 13:49

Scalar and Vector quantities.

Scalar quantites have a size only, e.g:

-mass

-energy

- speed

-time

Vector quantites have size and direction e.g.:

-force

-velocity

-acceleration

Speed

Speed is how fast an object is moving at a particular time. Direction isn't important when measuring speed. Speed is a scalar quantity. 

The speed of a object can change during the course of its journey. To calculate the average speed for a journey, you can use the following equation:

Speed= Distance/Time

Relative Speed

If two objects are moving near to eachother, their motion is described in terms of their relative speed. 

Direction is important when considering motion. Two crs travelling on a straight road

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