Motion Class 9 Notes

Motion Class 9 CBSE Notes – Chapter 8

Describing Motion:
If a body is constantly changing its position with respect to time or point of reference, then, that body is said to be in motion. There are various types of motion, namely:

1. Uniform Motion

It occurs when equal distances are covered in equal intervals of time by a body. Light travels in uniform motion through a vacuum.

1. Non-uniform motion

Unlike uniform motion, a body travels unequal distances in equal intervals of time. A car moving through traffic constitutes non-uniform motion.

1. Periodic motion

This is essentially a type of motion that repeats itself at periodic intervals of time. A vibrating tuning fork is an example of periodic motion

1. Oscillatory motion

This is a form of periodic motion that occurs in a regular cycle. A sine wave, the swing of a pendulum are examples of oscillatory motion.

Motion Class 9 Notes also explains the concept of motion along a straight line, one of the most simple types of motion. It is also called linear motion or rectilinear motion.