Motion in Physics

Types of Motion in Physics

The motion of an object depends on the type of force acting on the body. Examples of different kinds of motion are given below.

• Translational – It is the type, where an object moves along a path in any of the three dimensions.
• Rotational – It is the type, where an object moves along a circular path about a fixed axis.
• Linear – It is a type of translational motion where the body moves in a single direction along a single dimension.
• Periodic – It is the type of motion that repeats itself after certain intervals of time
• Simple Harmonic – It is the type of motion like that of a simple pendulum where a restoring force acts in the direction opposite to the direction of motion of the object. This restoring force is proportional to the displacement of the object from the mean position.
• Projectile – It is the type of motion which has a horizontal displacement as well as vertical displacement.
• Oscillatory – It is the type of motion which is repetitive in nature within a time frame. If it is mechanical it is called vibration.

Read More: Laws of Motion

Laws of Motion

Newton’s Laws of Motion laid the foundation for classical mechanics today. Although subject to minor limitations, these laws of motion are valid everywhere and are therefore used. The laws are given as stated below in a brief description

• First Law: Any object will remain in its existing state of motion or rest unless a net external force acts on it.
• Second Law: If an object has a certain mass, the greater the mass of this object, the greater will the force required to be to accelerate the object. It is represented by the equation F = ma, where ‘F’ is the force on the object, ‘m’ is the mass of the object and ‘a’ is the acceleration of the object.
• Third Law: For every action, there is an equal and opposite reaction.

The below video provides the Top 10 NTSE Important Questions on Motion Class 9

Frequently Asked Questions – FAQs

Q1

What is Periodic Motion?

It is the type of motion that repeats itself after certain intervals of time.

Q2

What is Rotational Motion?

A motion where an object moves along a circular path about a fixed axis is called Rotational Motion.

Q3

What is Newton’s First Law of Motion?

Any object will remain in its existing state of motion or rest unless a net external force acts on it.

Q4

State Newton’s Third Law of Motion.

Newton’s Third Law of Motion states that for every action there is an equal and opposite reaction.

Q5

What is Oscillatory Motion?

It is the type of motion which is repetitive within a time frame. If it is mechanical it is called vibration.

The below video provides the complete quiz of the chapter Motion Class 9

Motion is an important concept in Physics which can be better understood by applying conceptual knowledge to solve problems. Stay tuned with BYJU’S and learn various interesting physics topics with the help of engaging video lessons.