Question

Classify the following as linear, circular, vibratory or oscillatory motion.
i) The motion of a swing.
ii) The motion of the earth around the sun.
iii) The motion of a cyclist on a plain road.
iv) The motion of a falling stone.
v) The motion of a plucked string of a sitar.

Answer 1

Hint: The are different types of motion are based on the path travelled by the body/object - (circular, oscillatory and vibratory), the periodicity of the motion - (periodic and non-periodic) and the speed of the motion of object/body- (uniform and non -uniform motion).

Complete answer:
The motion is the change in the position of the object/body with respect to the time.
From given, we have,
Linear motion – the motion along a linear path.
Circular motion – the motion along a circular path
Oscillatory or vibratory motion – a to and fro motion or motion involving the vibrations.
In case of the motion of a swing, swing moves to and fro.
The earth revolves around the sun in a circular path.
As the cyclist moves on a plain road and not on a circular path, the motion will be linear.
The stone falls along a linear path.
When the string of a sitar is plucked, the string starts to vibrate.

i) The motion of a swing. – The oscillatory motion
ii) The motion of the earth around the sun. – The circular motion
iii) The motion of a cyclist on a plain road. – The linear motion
iv) The motion of a falling stone. – The linear motion
v) The motion of a plucked string of a sitar. – The vibratory motion

Note:
The things to be on your finger-tips for further information on solving these types of problems are: The oscillatory motion is sometimes considered different from the vibration motion according to the situation. For example, in the case of plucking of a sitar string, the motion is considered to be vibration and not oscillatory.