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Chapter 8 – Motion

The following Topics and Sub-Topics are covered in this chapter and are available on MSVgo:


When we speak about rest and motion, it is known as the origin in regard to a certain point. So, now we have two quantities that can be used to explain the change of place with reference to the change in position. We have studied the concept of range and displacement. The question now is what’s the difference between the two? 

Talking about distance, it is defined during the motion as the total path length covered. Only by magnitude will it be interpreted. The shortest distance between the original and final position is, on the other hand, displacement. For full representation, it demands both significance and direction. 

With regard to time, we may describe motion as the changing of an object’s location. A book falling off a shelf, water streaming from the sink, windows rattling, etc. All the motion of the exhibit. And the air we breathe shows motion! It pushes everything in the world. In a world that is in constant motion, we exist. The central particle of an atom-like object is also in continuous motion. In the universe, a physical phase is composed of some kind of motion. The motion may be either fast or slow, but there is motion. Due to its significance in the physical world, it is important that we pay due attention to the study of motion. Motion is defined predominantly in terms of the following words: 

  • Distance
  • Displacement
  • Speed and velocity 
  • Time
  • Acceleration 

Distance and displacement are used, as discussed earlier, to explain the shift in direction. 

Perhaps we have found that multiple things shift differently. In a curved road, certain objects pass, some in a straight line and a few others in a different direction. Motion is divided into three forms, based on the purpose of the movement: 

  • Linear Motion 
  • Rotary Motion  
  • Oscillatory Motion  

Linear Motion 

In linear motion, in either a straight line or a curved direction, the particles travel from one point to another. The linear motion is further broken according to the direction of motion, as follows. 

Rectilinear motion: A straight line is the direction of motion. 

Curvilinear motion-The movement’s direction is curved. 

The motion of the rail, baseball, the motion of a vehicle on the lane, etc. are a few examples of linear motion. 

Rotatory Motion 

The force that happens as a body rotates on its own axis is rotatory motion. The following are a few examples of rotatory motion: 

An example of rotary movement is the spinning of the earth along its own axis around the sun. 

An example of rotatory movement is the movement of wheels and the steering wheel along its own axis when driving a vehicle. 

Oscillatory Motion 

Oscillatory motion is a body’s motion regarding its mean location. A few of the oscillatory motion descriptions are 

The swing moves to and fro around its median location while an infant is pushed on a swing. 

A clock’s pendulum experiences oscillatory motion as it travels towards its mean position and fro. 

When strummed, the string of the guitar travels to and fro through its mean position, resulting in an oscillatory motion.

The Laws of Motion by Newton lay the foundations for classical mechanics today. These laws of motion, while subject to small restrictions, are applicable anywhere and are therefore used. As mentioned below in a brief summary, the laws are given 

  • First Law: Until a net external force operates on it, every entity will remain in its current state of motion or rest. 
  • Second Law: If an object has a certain mass, the higher the mass of that object, the greater the force needed to speed up the object. It is expressed by the equation F = ma, where ‘F’ is the force on the object,’ m’ is the object’s mass and ‘a’ is the object’s acceleration. 
  • Third Law: An equivalent and an opposite reaction occurs with any action. 

Examples Of Motion 

  • With the aid of a few illustrations, let us grasp motion clearly now. 
  • Our regular operations entail activity, such as walking, driving, shutting the door, etc. In these operations, there is a change in the location of the object concerned. 
  • An indicator of motion, too, is the passage of oxygen in and out of our lungs. 
  • There is motion in the vehicles transporting passengers from the pick-up point to the destination. In this situation, passenger locations are moved from one spot to another.

In this chapter, we learned about motion and its characteristics. We gained knowledge about the types of motion and laws of motion. We can further enhance your knowledge and study the graphical representation of motion.

1. What is motion for 9th class? 

In relation to the observer, the movement of any object from one position to another position is referred to as motion. 

2. How many types of motion are there in class 9? 

Three types of motion exist in class 9. Motion is classified into three kinds according to the nature of the movement: 

  • Linear Motion. 
  • The motion of Rotary. 
  • The motion of the Oscillatory. 

3. What is motion short answer? 

Motion in physics is the phenomenon in which an object, over time, changes its position. In terms of displacement, distance, velocity, acceleration, speed, and time, motion is mathematically described. 

4. What are the 4 types of motions? 

The four motion types are: 

  1. Linear. 
  2. Rotational. 
  3. Reciprocating.  
  4. Oscillating. 

5. What is motion measured in?

The measure of motion is speed. By dividing the distance covered by the time it takes to travel that distance, you can find the speed of the motion.

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High School Physics

  • Alternating Current
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  • Current Electricity
  • Dual nature of Radiation and Matter
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  • Light – Reflection And Refraction
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  • Absorption and Movement of Water in Plants
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Middle School Science

  • Acids, Bases And Salts
  • Air and Its Constituents
  • Basic Biology
  • Body Movements
  • Carbon and Its Compounds
  • Cell – Structure And Functions
  • Changes Around Us
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Middle School Math

  • Addition
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  • Boxes and Sketches
  • Data Handling
  • Fun With Numbers
  • Heavy and Light
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  • Squares
  • Subtraction
  • Tables And Shares
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  • Time
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