Key Learnings:
1.  If the position of an object does not change with time, it is said to be at
rest.
2. If the position of an object changes as time passes, it is said to be in
motion.
3. Reference point is a fixed point with respect of which a body is at rest or in
motion.
4. Rest and Motion are relative terms.
5. Distance is the length of actual path traveled by a body in a given time.
6.  Displacement is the shortest distance between the initial and final
positions of the body in a known direction.
7. A physical quantity which has both magnitude and direction is called as
vector quantity.
8. A physical quant
9. The S.I unit of distance and displacement is metre.
10. A body is said to be in uniform motion, if travels equal distances in equal
intervals of time.