An object is in motion if its place changes with respect to a fixed point which we call the reference point.
The distance of an object to a reference point in a stated direction gives the position of the object. Position is a vector quantity which has both direction and magnitude.
The change in position of an object is called displacement.
Distance traveled in unit time is called speed.
Average speed is calculated by dividing the total distance traveled by the total time taken.
When we talk about speed and direction, we use the term velocity.
If an object moves with constant speed its motion is called uniform motion.
Speeding Up: If an object covers more distance than pervious second its motion is called speeding up. Slowing Down: If an object covers less distance than pervious second its motion is called slowing down.