Newton’s Third Law of Motion [Simple Definition + Examples]

What is Newton's Third Law of motion? [Simple Definition + Example]

Newton’s third law is all about understanding the terms action and reaction.

That’s it.

Here’s newton’s third law of motion simple definition:

“To every action, there is always an equal and opposite reaction”

Don’t worry, if you have not understood the definition.

I’ll make it easy for you.

Let’s consider some Everyday Life examples to understand the above statement properly.

Newton’s Third Law Examples in Everyday Life

Here’s a list of Everyday Life examples of newton’s third law:

  • Pressing a spring by the hand
  • Recoil of a cannon
  • Rowing a boat by an ore
  • Fish swimming in the water
  • Bird flying in the sky
  • Recoil of a gun
  • Rocket taking off from the ground
  • Pushing a wall by the hand
  • Ball bouncing on the ground
  • And more…

Let’s understand each one of these examples with pictures. (So you’ll get an exact idea)

#1 Pressing a spring by the hand

Newton's third law example - Pressing a spring by the hand

This is how newton’s third law works, when a spring is pressed by the hand.

When a spring is pressed by the hand, the hand applies some amount of force on a Spring.

This force is known as the Action Force.

At the same time, 

Spring also applies the same amount of force (in the upward direction) on the Hand.

This force is known as the Reaction Force.

This thing shows the presence of newton’s third law of motion.

To every action, there is always an equal and opposite reaction.

Note that these forces are acting on two different bodies. (i.e., Spring and Hand)

#2 Recoil of a cannon

Example of newton's third law - Recoil of a cannon

This is how newton’s third law works, when a cannon is fired.

When a cannon is fired, a cannon applies some amount of force on the Cannonball.

This force is known as the Action Force.

At the same time, 

Cannonball also applies the same amount of force (in the backward direction) on a Cannon.

This force is known as the Reaction Force.

This thing shows the presence of newton’s third law of motion.

To every action, there is always an equal and opposite reaction.

Note that these forces are acting on two different bodies. (i.e., Cannonball and Cannon)

#3 Rowing a boat by an ore

Real life example of newton's third law - Rowing a boat by an ore

This is how newton’s third law works, while rowing a boat by an ore.

In order to row a boat, an ore applies some amount of force on the Water.

This force is known as the Action Force.

At the same time, 

Water also applies the same amount of force (in the forward direction) on an Ore.

This force is known as the Reaction Force.

This thing shows the presence of newton’s third law of motion.

To every action, there is always an equal and opposite reaction.

Note that these forces are acting on two different bodies. (i.e., Water and Ore)

#4 Fish swimming in the water

Meaning of newton's third law - Fish swimming in the water

This is how newton’s third law works, when a fish is swimming in the water.

When a fish is swimming in the water, a fish applies some amount of force on a Water.

This force is known as the Action Force.

At the same time, 

Water also applies the same amount of force (in the forward direction) on a Fish.

This force is known as the Reaction Force.

This thing shows the presence of newton’s third law of motion.

To every action, there is always an equal and opposite reaction.

Note that these forces are acting on two different bodies. (i.e., Water and Fish)

#5 Bird flying in the sky

Example of newton's third law of motion - Bird flying in the sky

This is how newton’s third law works, when a bird is flying in the sky.

When a bird is flying in the sky, a bird applies some amount of force on the Air.

This force is known as the Action Force.

At the same time, 

Air also applies the same amount of force (in the upward direction) on a Bird.

This force is known as the Reaction Force.

This thing shows the presence of newton’s third law of motion.

To every action, there is always an equal and opposite reaction.

Note that these forces are acting on two different bodies. (i.e., Air and Bird)

#6 Recoil of a gun

Newton's third law of motion example - Recoil of a gun

This is how newton’s third law works, when a gun is fired.

When a gun is fired, a gun applies some amount of force on a Bullet.

This force is known as the Action Force.

At the same time, 

Bullet also applies the same amount of force (in the backward direction) on a Gun.

This force is known as the Reaction Force.

This thing shows the presence of newton’s third law of motion.

To every action, there is always an equal and opposite reaction.

Note that these forces are acting on two different bodies. (i.e., Bullet and Gun)

#7 Rocket taking off from the ground

Newton's third law meaning - Rocket taking off from the ground

This is how newton’s third law works, when a rocket takes off from the ground.

When a rocket takes off from the ground, a rocket applies some amount of force on the Ground.

This force is known as the Action Force.

At the same time, 

Ground also applies the same amount of force (in the upward direction) on a Rocket.

This force is known as the Reaction Force.

This thing shows the presence of newton’s third law of motion.

To every action, there is always an equal and opposite reaction.

Note that these forces are acting on two different bodies. (i.e., Ground and Rocket)

#8 Pushing a wall by the hand

Newton's third law example in everyday life - Pushing a wall by the hand

This is how newton’s third law works, when a wall is pushed by the hand.

When a wall is pushed by the hand, the hand applies some amount of force on a Wall.

This force is known as the Action Force.

At the same time, 

Wall also applies the same amount of force (in the forward direction) on the Hand.

This force is known as the Reaction Force.

This thing shows the presence of newton’s third law of motion.

To every action, there is always an equal and opposite reaction.

Note that these forces are acting on two different bodies. (i.e., Wall and Hand)

#9 Ball bouncing on the ground

Meaning of newton's third law of motion - Ball bouncing on the ground

This is how newton’s third law works, when a ball is bouncing on the ground.

When a ball is bouncing on the ground, a ball applies some amount of force on the Ground.

This force is known as the Action Force.

At the same time, 

Ground also applies the same amount of force (in the upward direction) on a Ball.

This force is known as the Reaction Force.

This thing shows the presence of newton’s third law of motion.

To every action, there is always an equal and opposite reaction.

Note that these forces are acting on two different bodies. (i.e., Ground and Ball)

#10 Boy walking on the ground

Newton's third law of motion example in everyday life - Boy walking on the ground

This is how newton’s third law works, when a boy is walking on the ground.

When a boy is walking on the ground, a boy applies some amount of force on the Ground.

This force is known as the Action Force.

At the same time, 

Ground also applies the same amount of force (in the upward direction) on a Boy.

This force is known as the Reaction Force.

This thing shows the presence of newton’s third law of motion.

To every action, there is always an equal and opposite reaction.

Note that these forces are acting on two different bodies. (i.e., Ground and Boy)

#11 Swimmer swimming in the pool

Newton's third law example in real life - Swimmer swimming in the pool

This is how newton’s third law works, when a swimmer is swimming in the pool.

When a swimmer is swimming in the pool, a swimmer applies some amount of force on a Water.

This force is known as the Action Force.

At the same time, 

Water also applies the same amount of force (in the forward direction) on a Swimmer.

This force is known as the Reaction Force.

This thing shows the presence of newton’s third law of motion.

To every action, there is always an equal and opposite reaction.

Note that these forces are acting on two different bodies. (i.e., Water and Swimmer)

#12 Man lying on the bed

Newton's third law example in daily life - Man lying on the bed

This is how newton’s third law works, when a man is lying on the bed.

When a man is lying on the bed, a man applies some amount of force on the Bed.

This force is known as the Action Force.

At the same time, 

Bed also applies the same amount of force (in the upward direction) on a Man.

This force is known as the Reaction Force.

This thing shows the presence of newton’s third law of motion.

To every action, there is always an equal and opposite reaction.

Note that these forces are acting on two different bodies. (i.e., Bed and Man)

#13 Boxer hitting an opponent’s face

Newton's third law of motion example with picture - Boxer hitting an opponent's face

This is how newton’s third law works, when the boxer hits an opponent’s face.

When the boxer hits an opponent’s face, the boxer applies some amount of force on an Opponent’s face.

This force is known as the Action Force.

At the same time, 

Opponent’s face also applies the same amount of force (in the backward direction) on the Boxer.

This force is known as the Reaction Force.

This thing shows the presence of newton’s third law of motion.

To every action, there is always an equal and opposite reaction.

Note that these forces are acting on two different bodies. (i.e., Opponent’s face and Boxer)

#14 Boy jumping from a boat

Newton's third law example - Boy jumping from a boat

This is how newton’s third law works, when a boy jumps from a boat.

When a boy jumps from a boat, a boy applies some amount of force on a Boat.

This force is known as the Action Force.

At the same time, 

Boat also applies the same amount of force (in the forward direction) on a Boy.

This force is known as the Reaction Force.

This thing shows the presence of newton’s third law of motion.

To every action, there is always an equal and opposite reaction.

Note that these forces are acting on two different bodies. (i.e., Boat and Boy)

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There are so many other examples of newton’s third law that we are experiencing in our everyday life.

Summary

From the above examples, one thing is understood.

If there is an action, then there is always an equal and opposite reaction.

That’s how you can easily remember the simple definition of newton’s third law:

“To every action, there is always an equal and opposite reaction”

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What do you think, is it easy for you to understand this concept of newton’s third law?

(Let me know in the comments below)

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