MOTION

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A BODY IS SAID TO BE IN MOTION IF ITS POSITION CHANGES WITH RESPECT OF TIME. A book falling off a table, water flowing from the tap, rattling windows, etc all exhibit motion. TYPE OF MOTION 1. RECTILINEAR MOTION 2. CIRCULAR 3. ROTATIONAL 4. PERIODIC

Motion is the change in the position of an object with respect to its surroundings. It is the distance moved by an object or its displacement. The distance moved by an object in a unit time is called its speed. The speed of an object helps to compare whether a body is moving fast or slow

RECTILINEAR MOTION  MOTION IN STRAIGHT LINE IS CALLED RECTILINEAR MOTION • People riding an elevator within a building are in rectilinear motion. • The hot water that falls into the coffee cup from a coffee vending machine is in rectilinear motion. • Bowling balls within a lane is in rectilinear motion. • Planes in the sky that move in a straight line is in rectilinear motion. • A ball rolling down an inclined plane is considered to be in rectilinear motion. • Skateboarders going down an inclined path are in rectilinear motion.

CIRCULAR MOTION In physics, circular motion is a movement of an object along the circumference of a circle or rotation along a circular path. It can be uniform, with constant angular rate of rotation and constant speed, or non-uniform with a changing rate of rotation.

PERIODIC MOTION • Periodic motion, in physics, motion repeated in equal intervals of time. Periodic motion is performed, for example, by a rocking chair, a bouncing ball, a vibrating tuning fork, a swing in motion, the Earth in its orbit around the Sun, and a water wave. • It is too &fro motion

Rotational motion • Purely rotational motion occurs if every particle in the body moves in a circle about a single line. This line is called the axis of rotation. Then the radius vectors from the axis to all particles undergo the same angular displacement at the same time. The axis of rotation need not go through the body. • Rotation of earth about its own axis create the cycle of day and night. Motion of wheel, gears, motors, etc is rotational motion. Motion of the blades of the helicopter is also rotatory motion. A door, swiveling on its hinges as you open or