what is motion? write five examples
Answers
Motion means displacement or change in the position of an object over time. It can be described in terms of displacement, distance, velocity etc.
Answer :-
★ Motion : An object is said to be in motion if it changes its position with respect to its surrounding with passage of time. For e.g., A train moving on rails.
• Examples of Motion are :-
=> A cyclists cycling on a circular track.
=> A bus going from one place to another.
=> A boy is throwing ball upwards and catching it back again.
=> Movement of a man from his home to the market.
=> Motion of a soccer ball when kicked by a footballer.
★ More to know :-
• One Dimensional Motion - The motion of an object is said to be one dimensional if only one of the three coordinates specifying the position of the object changes with time.
Here the object moves along a straight line. This motion is also called rectilinear or linear motion.
• Two Dimensional Motion - The motion of an object is said to be two dimensional if only two of the three coordinates specifying its position changes with time.
Here an object moves along the plane. This tupe of motion is the basis of kinematics and lead to development of Equations of Motion.
• Three Dimensional Motion - The motion of an object is said to be three dimensional if all the three coordinates specifying its position changes with time.
Here an object moves in Space.
• Rest - An object is said to be at rest if it does not change its position with respect to its surroundings with the passage of time.
★ Aid to memory =
• If the position of an object changes by distances much greater than its own size in a reasonable duration of time, then the object may be regarded as a point object.
• An object may be at rest with respect tobone one object and at the same time it may be in motion relative to another object. Hence, rest and motion are relative terms.