Types of Forces

Remember, forces can act in sneaky ways, like invisibly pulling or pushing objects. They make the world exciting, so go experiment—just don’t blame gravity for dropping your ice cream! 🍦

This concept is about types of forces. Here the students will be introduced to different types of forces. After learning this concept, the students will be able to explain push and pull and their effects.

After reading the concept, students will be able to:

• Explain types of forces with examples,

• Understand what contact force is., analyse the types of contact force with examples.

• Know what is non contact force and can give non contact force examples.

• Explain how the force of friction depends on the texture of a surface.

Each concept is explained to class 4 students using descriptions, illustrations, and concept maps. After you go through a concept, assess your learning by solving the two printable worksheets given at the end of the page.

Download the worksheets and check your answers with the worksheet solutions for the concept of the Types of Forces provided in PDF format.

If gravity suddenly stopped working for a day, what would be the first thing you'd do—float to space, bounce around like a superhero, or panic about your snacks flying away? 🚀🍿

What is Force?

A push or a pull on an object is called force. Force is the reason why motion is created on an object.

 

How Does Force Interact with Objects?

• The interaction between one object with another results in a force acting between the two objects.

• If two bodies exert force on an object from the opposite direction, then the total force would be the difference between the two forces exerted by the two bodies.

• If two bodies exert force in the same direction on the same object, then the total force acting on that object would be the sum of both the forces exerted by the two bodies.

Characteristics of Force:

• Force has the ability to make a body that is at rest to move.

• Force can stop a moving body or slow it down.

• It can increase the speed of a moving body.

• Force can change the direction of a moving body.

• Force can alter the shape and size of a body.

If friction disappeared for a day, what would you try first—sliding everywhere like an ice skater, racing cars with no brakes, or holding onto walls to avoid slipping? 🛼🚗

 

Types of force:

Force can be broadly classified into contact and non-contact forces.

1. Contact force:

• These forces act on bodies only when they are in physical contact.

• No attraction or repulsion occurs between the two objects.

Examples: Muscular force, frictional force, and mechanical force.

If contact forces stopped working for a day, what would happen first—would you fall through your chair, struggle to high-five your friends, or float around like a ghost? 🪑👻

 

 

2. Non-contact force:

• These forces act on bodies that are not in physical contact.

• Attraction or repulsion exists between the two objects.

Examples: Gravitational force, electrostatic force, and magnetic force.

If non-contact forces vanished for a day, what would be weirder—floating in space without gravity, magnets losing their pull, or your hair staying calm without static shocks? 🌌🧲⚡

Types of contact forces:

1. Muscular force:

• This force is applied by using different parts of the body like arms and legs.

• This force is exerted due to the action of our body muscles.

• Muscular force is a type of contact force, so our body touches the object while exerting the force.

Muscular Force Examples:

 

If muscular force took a break for a day, what would you miss most—lifting your favorite snacks, waving at friends, or running to catch the ice cream truck? 💪🍦👋

2. Frictional force:

• The frictional force is always exerted from opposite directions and is a type of contact force.

• Friction happens when two surfaces rub against each other.

• Such a type of force can slow down or stop a moving object.

Frictional Force Examples:

If frictional force disappeared for a day, what would be the wildest part—sliding down the street like a penguin, cars spinning endlessly, or your shoes refusing to stay put? 🐧🚗👟

3. Mechanical force:

• This type of contact force is generated by machines on another object.

• Mechanical force features a direct contact between two objects.

Mechanical Force Examples:

 

If mechanical forces took the day off, what would be the funniest struggle—pushing a door that won't budge, riding a bike that won’t pedal, or playing a piano that won’t press? 🚪🚲🎹

Types of Non-contact Forces:

1. Gravitational force:

• Gravitational force is the attractive force that is exerted by the earth on other bodies.

• Due to this gravitational force, the earth pulls everything towards itself.

Gravitational Force Examples:

If gravitational force went on vacation for a day, what would you try first—jumping to the moon, watching your stuff float away, or having a mid-air picnic? 🌕🍉🎈

 2. Magnetic Force:

• A magnet can exert a force on another magnetic object without touching it.

• Such a force creates either attraction or repulsion between electrically charged particles because of their motion.

Examples:

 

If magnetic force vanished, what’s worse—losing fridge magnets or compasses going wild? 🧲🧭

 3. Electrostatic Force:

• It is a type of non-contact force.

• A charged body exerts such a force on another charged or uncharged body.

• There is a force of attraction between unlike charges and a force of repulsion between like charges.

Examples:

 

If electrostatic force vanished, would you miss static shocks or balloons sticking to your hair? ⚡🎈

New Words:

Attractive force: It is the force that draws one object towards another.

Repulsive force: It is the force that makes one object move away from another.

Like and unlike charges: Charges with the same sign, i.e., positive-positive, are called like charges. Charges with the opposite sign, i.e., positive-negative charges, are called, unlike charges.

Did You Know?

• When an object is partially or totally immersed in a liquid, a force is exerted upwardly on that object called the buoyant force.

• A lighter object is pulled by the earth very slowly, whereas a heavier object is pulled by the earth rapidly. It means that the higher the mass, the greater the gravitational force.

 

 

Curious about how forces shape our world? Keep exploring and discover how they make everything move, stop, and change! 🌍💥

MCQs

1. Which of the following is an example of contact force?

• A) Gravity

• B) Friction

• C) Magnetic force

• D) Electrostatic force

2.  What force keeps you from floating away from Earth?

• A) Friction

• B) Gravitational force

• C) Magnetic force

• D) Electrostatic force

3. Which force is responsible for a magnet attracting metal?

• A) Friction

• B) Electrostatic force

• C) Magnetic force

• D) Muscular force

4. What would happen if friction disappeared?

• A) Objects would slide forever

• B) Objects would stop moving

• C) Objects would fly into the air

• D) Objects would stick together

5. Which of these is an example of a non-contact force?

• A) Pushing a car

• B) Pulling a rope

• C) Gravitational force

• D) Lifting a book

 

Easy Level Worksheets

Intermediate Level Worksheets

Difficult Level Worksheets