speed

go back to kinematics

=** Speed **=

The **speed** of an object is the magnitude of its velocity (the rate of change of its position).
 * Speed** refers to how __fast__ an object is moving. Speed can be though of as the rate at which an object covers distance. A fast-moving object has a high speed and covers a relatively large distance in a short amount of time. A slow-moving object has a low speed and covers a relatively small amount of distance in a short amount of time. An object with no movement has a zero speed.



 The **average speed** of an object in an interval of time is the distance traveled by the object divided by the duration of the interval; the instantaneous speed is the limit of the average speed as the duration of the time interval approaches zero.

The speedometer indicates that the car is going at the speed of 100mph. Let's assume that the car travels 200 miles in the span of 2 hours.

Therefore: Average Speed = 200miles / 2 hours = 100mph

    