Physics AVERAGE SPEED

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AVERAGE SPEED

Average Speed

`text(Average speed)=text(Total Distance Travelled)/text(Total Time Taken)`

we define average speed of a particle as the ratio of the total distance travelled to the total time taken. SI units of speed is `m//s`.

Velocity is defined as rate of change of displacement with time. Velocity is a vector quantity. SI unit of velocity is `m//s`.

Average Velocity

`text(Average velocity) = text(Total Displacement)/ text(Total time)`

Average velocity is defined as the ratio of the total displacement covered to the total time taken.

Just as distance is always greater than or equal to the magnitude of displacement, average speed is greater than or equal to the magnitude of average velocity. Average speed and the magnitude of average velocity are equal when particle is travelling in a straight line without change in direction.