# Chapter 11 – Force and Pressure

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

Introduction

Force and Pressure are two important chapters of Physics for the students of 8th standard. Do you ever think about how one object can move faster than the other? Why does an object sometimes move slowly and sometimes fast or how it can change its direction of motion? How does a football move? And how does a goalkeeper stop that ball? All these happen when we apply force, a push or a pull, to that particular object, and when we measure how much force is acting per unit on the area of a surface, it is called pressure. In this article, we will discuss with you the definitions, types, and differences of force and pressure.

#### What is Force?

Force can be defined as a push or a pull. When a physical interaction occurs between two objects, then a force arises, and it will change the present condition of the object. Simply, we can say that a force can change the state of motion when it is applied to an object. The various types of forces are as follows:-

• Muscular Force
• Contact forces
• Non-Contact Forces
• Magnetic Force
• Frictional Force
• Gravitational Force or Exploring Forces
• Electrostatic Force

#### What is Pressure?

Pressure can be defined as the force put in per unit area of a surface. The pressure will be low when force is applied to a large surface area, and the pressure will be high when force is applied to a small surface area. Do you know the pressure exerted by liquids and gases? Have you ever imagined how water is coming out from leaking holes or joints in water fountains or bath showers? This happens because liquids and gases also exert pressure in all directions. The various types of pressure are as follows:-

• Atmospheric Pressure
• Absolute Pressure
• Overpressure
• Differential Pressure

In Mathematics, pressure can be calculated out like this:-

P=F/A

Here,

‘P’ means ‘Pressure’

‘F’ means ‘External Force Magnitude’

‘A’ means ‘Surface Area of the contacted surface’

#### What are the differences between Force and Pressure?

Although force and pressure are related, there are some basic differences between force and pressure. We have mentioned these differences in the below table:-

ForcePressure
Force can change the shape of an object as in force physical interaction occurs between two objects.The pressure is defined as a force that is perpendicular to an object’s surface per unit area on which the force is divided.
Its unit is Newton, and it is represented by N.The pressure unit is Pascal, and it is represented as Pa.
Force has both magnitude and direction, so it is a vector quantity.Pressure only has magnitude, so it is a scalar quantity.
Force can be applied to edges, face and side of an object.Pressure can be applied to the faces of an object.
The velocity of force can be changed.The velocity of pressure cannot be changed.
Force can be measured with the instrument dynamometer.Pressure can be measured with the instrument manometer.

#### FAQs

What is force and pressure with example?

A force is a pull or a push. When a force is applied to any object, it changes its direction towards the movement, speed, and shape of the object. Pressure can be defined as the force put in per unit area of a surface. This can be explained with the help of an example. When an object is released from a certain height, it will fall on the ground as there is gravitational attraction and it is known as gravitational force, and the force per unit area of a surface is known as pressure.

How do you calculate force and pressure?

As force and pressure are related so you can calculate one using the physical equation of the other. You can calculate force and pressure with the following equation: – P=F/A. Here, as pressure is the force divided by the unit area of a surface, its meter-kilogram-second (MKS) units are N/m2 or Newton’s per square meter.

Is force and pressure physics?

Yes, force and pressure physics entities.

Is pressure a type of force?

Yes, the pressure is defined as a physical force that applies to an object.

What is the pressure in physics?

In Physics, the pressure is defined as the applied force perpendicular to an object’s surface per unit area on which the force is divided.

What are 5 units of pressure?

The 5 units of pressure are Pascal (Pa), Kilopascal (KPa), Megapascal (MPa), psi (pound per square inch), torr (mmHg), atm (atmospheric pressure), and bar.

You will get the entire concept of Force and Pressure in the form of a video on our MSVgo app. In our video library, the concept of force and pressure are discussed with examples. In the MSVgo app, the videos will help you to understand the core concept of force and pressure. You can download this app on your mobile from Google Play Store & iOS App Store.

### High School Physics

• Alternating Current
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• Dual nature of Radiation and Matter
• Electric Charges and Fields
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### High School Chemistry

• Acids, Bases and Salts
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### High School Biology

• Absorption and Movement of Water in Plants
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• Neural Control And Coordination
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• Plant Growth and Development
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• Principles of Inheritance and Variation
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• The Endocrine System
• The Fundamental Unit Of Life
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• Tissues
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• Transport in Plants

### High School Math

• Algebra – Arithmatic Progressions
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• Algebra – Pair of Linear Equations in Two Variables
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• Algebra – Principle of Mathematical Induction
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• Binomial Theorem
• Calculus – Applications of Derivatives
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• Permutations and Combinations
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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
• Chemical Effects Of Electric Current
• Chemistry in Your Life
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• Conservation Of Plants And Animals
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• Elements and Compounds
• Fibre To Fabric
• Food production and management
• Force And Pressure
• Forests: Our Lifeline
• Friction
• Fun With Magnets
• Garbage In, Garbage Out
• Getting To Know Plants
• Health and Hygiene
• Heat
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• Life Processes: Nutrition in Animals and Plants
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• Materials: Metals And Non-Metals
• Matter and Its States
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• Micro Organisms: Friend And Foe
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• Universe
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• Water: A Precious Resource
• Weather, Climate And Adaptations Of Animals To Climate
• Winds, Storms And Cyclones

### Middle School Math

• Addition
• Area and Its Boundary
• Boxes and Sketches
• Data Handling
• Fun With Numbers
• Heavy and Light
• How Many
• Long And Short
• Mapping
• Measurement
• Money
• Multiplication and Factors
• Multiply and Divide
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• Parts and Wholes
• Pattern Recognition
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• Rupees And Paise
• Shapes And Angles
• Shapes And Designs
• Shapes and Space
• Similarity
• Smart Charts
• Squares
• Subtraction
• Tables And Shares
• Tenths and Hundredths
• Time
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