A body in motion may be defined as follows :
A body is said to be in motion if it change its position continuously with respect to a fixed point in Its surroundings.
If the position of a body changes with time relative to any fixed point in its surroundings, then the body is said to be at motion.
- Cars and buses running on the road.
- Birds and aeroplane flying in the air.
- The running blades of a fan.
- The different parts of a running machine.