what is motion

MOTION AND ITS TYPES...

By : Yashika GuptaClass: IX-A

What is motion? Definition..

When a body is continuously its position with respect to the frame of reference; then we say that the body is in motion

SCALARS AND VECTORS

The motion of objects can be described by words such as distance ,displacement, speed ,velocity , and acceleration.

These mathematical quantities which are used to describes the motion of objects can be divided into two categories . The quantity is either a vector or a scalar . These two categories can be distinguished from one another by their distinct definitions

What are the different types of motion?

Linear motion Curvilinear motion (circular)

1.Rotatory motion

2.Revolution motion

Oscillatory motion

Reciprocatory motion (vibration)

Brownian motion

Linear Motion It can be described mathematically using only one spatial dimension. It can be Uniform, that is with constant velocity or non- uniform , that is,

with a variable velocity. The average velocity v during a finite time span of a particle undergoing

linear motion is equal to :- v= D/ T

Linear Motion When a body moves in a straight line then the linear motion or

rectilinear motion. The motion of a particle (point –like object ) along the line can be described by

its position x , which varies with t (time).

Example:-

An athlete running a 100meter race along a straight track is said to be a linear motion or rectilinear motion.

Oscillatory Motion Oscillatory motion : A body is said to be in oscillatory motion when it swings to and fro

about a mean position. Example: the pendulum of a clock . the swing etc.,

Curvilinear Motion

When a moves along a curved path then the motion is called curvilinear motion

There are two types of curvilinear motion:-

1. Rotatory motion

2. Revolution motion

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