Explain the types of motion.
Answers
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, motion is classified into three types as follows:
Linear Motion
Rotary Motion
Oscillatory Motion
Linear Motion
In linear motion, the particles move from one point to another in either a straight line or a curved path. The linear motion depending on the path of motion is further divided as follows
Rectilinear Motion – The path of the motion is a straight line.
Curvilinear Motion – The path of the motion is curved.
A few examples of linear motion are the motion of the train, football, the motion of a car on the road, etc.
Rotatory Motion
Rotatory motion is the motion that occurs when a body rotates on its own axis. A few examples of the rotatory motion are as follows:
The motion of the earth about its own axis around the sun is an example of rotary motion.
While driving a car, the motion of wheels and the steering wheel about its own axis is an example of rotatory motion.
Oscillatory Motion
Oscillatory motion is the motion of a body about its mean position. A few examples of oscillatory motion are
When a child on a swing is pushed, the swing moves to and fro about its mean position.
The pendulum of a clock exhibits oscillatory motion as it moves to and fro about its mean position.
The string of the guitar when strummed moves to and fro by its mean position resulting in an oscillatory motion.
There are different types of motion: translational, rotational, periodic, and non periodic motion.
Translational Motion
A type of motion in which all parts of an object move the same distance in a given time is called translational motion. Examples are vehicles moving on a road, a child going down a bird flying in the sky. Translational motion can be of two types, rectilinear and curvilinear. Table shows the differences between rectilinear and curvilinear motions.
Rectilinear motion Curvilinear motion
1. When an object in translational motion moves in a straight line, it is said to be in rectilinear motion. 1. When an object in translational motion moves along a curved path, it is said to be in curvilinear motion.
2. Examples are a car moving on a straight road and a train moving on a straight track. 2. Examples are a stone thrown up in the air at an angle and a car taking a turn.