When an object changes its place with time, the object is said to be in motion. And when an object does not change its position with time, the object is said to be in the rest.
To understand motion three things are needed to be considered, A Reference Point, Time, and An Object.
Example: Often we say that our school or a shop is 2 km or four km from our house. Here, our house is taken as a reference point, from where distance is considered.
Motion is of many types, such as motion along a straight line, motion along a circular path, zig-jag or erratic motion, controlled motion, uncontrolled motion, Uniform motion, Non-uniform motion, etc.
Motion Along A Straight Line: When an object changes its position with time along a straight line, this is called the Motion along a Straight line. . . .