Explain average velocity and average speed.

Explanation

When an object is in motion, its position change with time and with what rate of time it will change its position that can be find in two ways.
If we only find time rate then it is speed and if we find time rate with direction then it is velocity
Speed: The distance covered by object in unit time is called speed.
Average speed: The ratio of total distance covered during travelling to total time taken is called average speed.
Its unit is mal and it is a scalar quantity. Hence its value is always positive.
Velocity : The displacement covered in unit time is called velocity
It is a scalar quantity
Average velocity is defined as the change in position or displacement (Axl divided by the time intervals an, in which the displacement occurs:
`therefore bar v = (x _(2) - x _(1))/(t _(2) - t _(1)) = (Delta x)/(Delta t)`
where` x_(1) and x_(2)` are the positions of the object at time `t_(1) and t_(2)` respectively.
The SI unit for velocity is `ms^(-1)` although kmh is used in many everyday applications.
For motion in a straight line, the directional aspect of the vector can be taken care of by .+. and - signs and we do not have to use the vector notation for velocity. Magnitude of average velocity can be positive, negative or zero. Resultant effect of motion can be known from average velocity Average speed can be greater than or equal to the magnitude of average velocity. For uniform motion at every moment, velocity is equal to average velocity Consider the motion of the car, the portion of the x-1 graph between t = 0s and t = 8s is blown up and shown in figure.