The rate at will a body travels is speed. The average speed is given by:
Average Speed = Distance/Time
Meters per second
Centimeters per second
Kilometers per second
Kilometers per hour
Miles per hour
Distance and displacement
Distance moved by an object in a particular direction is displacement. Distance is a scalar quantity and displacement is a vector.
Speed and velocity
Distance traveled per time taken is called velocity. Speed is a scalar quantity and Velocity is a vector.
velocity=change in displacement/time taken
Displacement time graphs
We can represent the changing position of moving object by drawing a displacement time graph.