Difference between revisions of "Difference Between Speed And Velocity"

Speed and velocity both are used to be as the words meaning the same when used in normal day to day situations . However the physicists out there treat those as different and technically there are many differences between them . Below are the key differences between the two .

Speed Velocity
Speed is defined as the rate of change of distance per unit time . Velocity is defined as the rate of change of displacement per unit time .
Speed is a scalar quantity . It has only magnitude . Velocity is a vector quantity . It has both magnitude and direction . The scalar absolute value (magnitude) of velocity is called "speed" .
When something moves in a circle and returns to its starting point, its average speed is circumference divided by time taken . When something moves in a circle and returns to its starting point, its average velocity is zero .
Example : If a car is said to travel at 90 km/h, its speed has been specified. If the car is said to move at 90 km/h to the south, its velocity has now been specified.

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