Question

Why is it stated that motion and rest are relative?
Explain with examples various types of motion.
plzz it's very urgent
i want serious answers, otherwise i'll report

Answer 1

An object is said to be in motion if it changes its position with respect time and observer.

An object is said to be at rest if it does not changes its position with respect time and observer.

MOTION AND REST ARE RELATIVE TERMS.

That means it all depends upon the observer who is observing the object.

Example:

• A person standing in a moving bus is at rest with respect to bus and is in motion with respect to observer on the ground.

• A girl swinging in garden is in motion with respect to persons moving in garden and at rest with respect to swing.

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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.

• Example :- When an elevator moves from the ground floor to the top floor.

Curvilinear Motion – The path of the motion is curved.

• Example :- Running race in curved track

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.