Question

Concept of point object...

Answer 1

=> If the position of an object changes by distances much greater than it's own size in a reasonable duration of the time then the object may be regarded as a point object...

Example => A train under a journey of several 100kms can be regarding as a point object...

Answer 2

Answer:

Point object is an expression used in kinematics: it is an object whose dimensions are ignored or neglected while considering its motion. A point object refers to a tiny object which is calculated or counted as dot object to simplyfy the calculations. A real object can rotate as it moves.