TYPES OF MOTION
Motion of Class 9
We may have noticed that different objects move differently. Some objects move in a curved path, some in a straight path, and a few others in a different way. According to the nature of the movement, the movement is divided into three types as follows:
- Linear Motion
- Rotary Motion
- Oscillatory Motion
Linear motion (or translatory motion)
The motion of a moving car, a person running, a stone being dropped. The motion is further is divided into
- Rectilinear Motion – In rectilinear motion, the path of the motion is a straight line.
- Curvilinear Motion – In curvilinear motion, the path of the motion is curved.
The motion of an electric fan, motion of earth about its own axis.
- The motion of the Earth on its axis around the Sun is an example of rotational motion.
- An example of rotational motion when driving a car is the movement of the wheels and the steering wheel around its axis.
The motion of a simple pendulum, a body suspended from a spring (also called to and fro motion).
- When a child is pushed on the swing, the swing moves back and forth around its center position.
- A clock pendulum oscillates as it moves back and forth around its middle position.
- The guitar string moves back and forth about the middle position when strummed, resulting in an oscillating motion.