NCERT Solutions for Class 8 Science Chapter 11 Force and Pressure

NCERT Solutions for Class 8 Science Chapter 11 Force and Pressure help you learn about how we move things. They explain that force is just a push or a pull. These force and pressure class 8 questions and answers make it easy to understand how objects change shape or speed. You can use them to study for your exams.

Force as Push or Pull

A force is basically a push or a pull on an object. We use it every single day without even thinking about it. For example, you pull a drawer to open it or push a door to close it. Force happens when two things interact with each other. If there is no interaction, there is no force. Imagine a ball lying on the ground; it won't move until you give it a push.

Examples of Push and Pull

• Push: Moving a toy car, hitting a football, or closing a heavy lid.

• Pull: Drawing water from a well, dragging a bag, or opening a room door.

• Both: Scrubbing a floor involves both pushing and pulling the brush.

How Force Changes Things

Force can do many things to an object. It's like a superpower for moving stuff. We see these changes in our daily lives constantly.

• Change in Motion: It can make a still object move or stop a moving one.

• Change in Direction: It can turn a moving ball to a new side when a player hits it.

• Change in Shape: It can squash a plastic bottle or stretch a rubber band.

• Change in Speed: If you push a moving bicycle harder, it goes much faster.

Enroll Now for Kids Online Classes

Different Types of Forces

Forces are split into two main groups. These are contact forces and non-contact forces. Understanding these helps with force and pressure class 8 questions and answers NCERT. We need to know which force requires touching and which one works through the air.

Contact Forces

These forces happen only when two things touch each other. If there is no contact, these forces cannot work.

• Muscular Force: This is the force we use with our arms and legs. We use it to lift bags or kick a ball. Animals like horses and bullocks also use muscular force to pull carts.

• Frictional Force: This force acts between two surfaces. It always opposes the motion. It slows down a rolling ball on the ground until it stops. Without friction, we would not be able to walk on the floor.

Non-Contact Forces

These forces can work even if things are not touching. They act from a distance through a field.

• Magnetic Force: This is when a magnet pulls iron nails toward it. You can see this move the nails without the magnet ever touching them.

• Electrostatic Force: A charged balloon sticking to a wall is a great example of this. You can charge a plastic comb by rubbing it on dry hair to pick up tiny bits of paper.

• Gravitational Force: This is the earth pulling everything down. It is a universal force. Everything that has mass pulls on everything else, but the earth's pull is the strongest one we feel.

Understanding Pressure in Science

Pressure is about how much force is put on a certain area. If the area is small, the pressure is very high. This is why a sharp knife cuts better than a blunt one. The sharp edge has a tiny area.

Calculating Pressure

To find pressure, we use a simple rule.

• Pressure = Force / Area.

• Small area means more pressure.

• Large area means less pressure.

Real-Life Pressure Examples

• Porters: They wear a round cloth on their heads to increase area and reduce pressure.

• Shoulder Bags: School bags have wide straps so they don't hurt your shoulders.

• Tools: A hammer has a flat head to spread the force when you hit a nail.

Pressure from Fluids and Air

Not just solid things, but water and air also put pressure on us. This is a big part of force and pressure class 8 NCERT solutions.

Water Pressure

Liquids like water push on the walls of their container. The deeper you go in a pool, the more pressure you feel.

• Water pushes in all directions.

• It pushes harder at the bottom than at the top.

Atmospheric Pressure

Our earth is covered by a thick layer of air. This air has weight and it pushes down on everything. We call this atmospheric pressure.

• Why we don't feel it: The pressure inside our bodies balances the air pressure outside.

• Dropper Example: When you squeeze a dropper bulb, air goes out. The air outside then pushes water into the tube.

Solve Exercise Questions Easily

Using force and pressure class 8 questions and answers pdf or online notes helps you finish your homework fast. It makes complex ideas feel like simple stories.

Quick Practice Table

Why Use NCERT Solutions?

These solutions are made by experts. They use the same words as your textbook. This helps you get better marks because you answer exactly what is asked. We want you to feel confident during your science tests.

Make After-School Learning Smooth and Engaging with CuriousJr

Looking for online tuition classes that make learning simpler and keep your child interested? CuriousJr School Online Classes help students understand concepts faster through live interactive sessions, practical examples, and fun activities that build curiosity.

Why CuriousJr Is a Smart Pick for Your Child:

• Live interactive classes that make each topic easy to follow

•  Two dedicated mentors for personal guidance and support

•  Visual and activity-based learning for deeper understanding

•  Curriculum aligned with CBSE, ICSE, and State Boards

• Regular quizzes, worksheets, and performance tracking

CuriousJr helps students learn Science, Maths, English, and Social Studies in a fun and interactive way. With ongoing support, children grow more confident, stay motivated, and build strong learning habits.

Want to know how CuriousJr can help your child do better in school? Book a demo class today.