Types Of Motion

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Kinds of Motion Based on the path taken by the bodies in motion we can classify the motion of bodies as translational (linear), vibrational or oscillational, rotational and random. To understand the kinds of a motion, a body can be viewed as being made up of a number of tiny particles. Translatory Motion The motion of an object is said to be translatory if the position of the object is changing with respect to a fixed point or object. All the particles of a body excuting translatory motion move in the same direction traversing parallel paths. The path traversed by the body in executing translatory motion may be either linear, circular, curve or any irregular shape. The motion will result in a change in location unless in the case where the body returns to its original location. Eg: (1) Rotatory Motion The motion of an object is said to be rotatory if the motion of all the particles of body is circular (i.e. along a circular path) with respect to an imaginary line called the axis of rotation. This happens when an object spins. The axis of rotation may be internal or external to the body. The center of the circular path that each particle traces lies on the "axis of rotation". Eg: (1) A spinning Top (2) The Wheel of a moving vehicle (3) The hands of a clock Oscillatory Motion Oscillatory motion is repetitive and fluctuates between two locations. The to and fro motion of an object about a fixed point is called oscillatory motion or vibratory motion. Eg: (1) An Oscillating Table Fan (2) The Pendulum of a wall clock (3) A Swinging Cradle (4) Opening and Closing the door of a refrigerator. Bodies excuting two or more types of motion Some of the bodies in motion may be executing two or more types of motion at the same time. Eg: (1) A running vehicle executes both translatory as well as rotatory motion. The wheels of the vehicle execute

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