COMPETITIVE CRACKER

MOTION If we look around us, we find that there are number of objects which are in motion. An object is said to be in motion if it change its position with the passage of time. In other  words, the movement of an object is known as the motion of the object. Now observe the following bodies or objects and we will be able to understand the meaning of the term "motion". Cars, cycles, motorcycles, scooters, buses, rickshaws, trucks etc. running on the road, Birds flying in the sky, Fish swimming in water. All these objects are in motion. Very small objects like atoms and molecules and very large objects like planets, stars and galaxies are in motion. Thus, all objects ranging from a smallest atom to the largest galaxy are in continuous motion. Types of Motion : (A) Linear motion :   A body has linear motion if it moves in a straight line or path. Ex.    (i) Motion of a moving car on a straight road.          (ii) Motion of a...

An object changes its position with respect to a reference point with elapse of time, the object is said to be in motion. Rest:- When an object does not change its position with respect to a reference point with elapse of time, the object is said to be in rest. Example  – When a vehicle changes its position with respect to an electric pole (a reference point) with elapse of time, then vehicle is called in motion. And if the same vehicle does not change its position with respect to that electric pole, the vehicle is called in the state of rest. Thus to observe the motion of any object; two things are necessary – a reference point and time. In the above example; vehicle is the object and electric pole is the reference point. A building, tree, or any other static thing can be taken as reference point to observe the motion of an object. Motion along a straight line: When an object moves along a straight line, the motion of the object is called rectilinear motion. ...