In short,

Newton’s second law of motion is all about understanding these three terms:

**Acceleration – a**

**Net Force – F**_{net}

**Mass – m**

Now, read the statement of Newton’s 2^{nd} law of motion mentioned below.

**Newton’s second law of motion states that:**

*“The **acceleration** is directly proportional to **net force** applied and inversely proportional to **mass** of the object”*

## Newton’s second law Examples

**Don’t worry.** (If you have not understood the above statement)

See this,

Let’s understand the above statement and Newton’s second law examples in a practical way.

(One by One)

### Example #1

According to Newton’s second law of motion,

Acceleration is **directly proportional** to net force and **inversely proportional** to mass of the object.

Let’s divide this statement in two cases.

**Case 1:** Acceleration is directly proportional to net force applied on the object.

What does it mean?

It’s simple.

As the mass of this box is more, **more force** is required to lift this box.

So in this case,

Acceleration of the box is **directly proportional** to the net force applied on it.

*(More the net force applied on the box, more easily the box will accelerate further)*

**Case 2:** Acceleration is inversely proportional to mass of the object.

In the above case,

As the box has a large mass, it requires a large amount of force, right.

Now what happens if the mass of the box is less?

See this,

The question is, why is it easy for this boy to lift this box?

The reason is simple,

As the box has **less mass,** it is easy for this boy to lift the box.

Therefore,

In this case, acceleration of the box **inversely depends** upon its mass.

*(Less the mass of an object, the more easily that object accelerates further)*

### Example #2

According to Newton’s second law,

Acceleration is **directly proportional** to net force and **inversely proportional** to mass of the object.

In this example, consider the bag as an object.

**Case 1:** Acceleration is directly proportional to net force applied on the object.

Why is it difficult to move this bag?

It’s simple.

As the mass of the bag is more, **more force** is required to move it.

So in this case,

Acceleration of the bag is **directly proportional** to the net force applied on it.

*(More the net force applied on the bag, the more easily it will accelerate further)*

**Case 2:** Acceleration is inversely proportional to mass of the object.

In the above case,

As the bag has a large mass, it requires a large amount of force.

Now what happens if the object has less mass.

See this,

Here, consider the tray as an object.

Now the question is, why is it easy for this child to accelerate this object?

The reason is simple.

As the object has **less mass,** it is accelerating further easily.

So,

In this case, acceleration of an object **inversely depends** upon its mass.

*(Less the mass of an object, the more easily that object accelerates further)*

### Example #3

Have you seen any newton’s second law example in a sport?

**Simply think, **what happens when you hit the ball by the bat?

How Newton’s second law of motion works here?

Okay, I’ll make this simple.

See this,

Here, the player has to apply **more force** in order to hit the football.

It means that,

Even if the player applies a large force on the ball, the ball will not accelerate easily to a far distance.

(As the mass of the football is more)

Therefore, acceleration of football is **inversely proportional** to its mass.

Now when a tennis ball is given to the player, see what happens…

Here, the player has to apply** less force** in order to hit the ball.

As the tennis ball has less mass**, **with less amount of force the ball accelerates to a longer distance.

Therefore,

Acceleration of a tennis ball is **directly proportional** to the net force applied on it.

### Example #4

How Newton’s second law of motion works while you are riding a bicycle?

According to definition of Newton’s second law,

Acceleration is **directly proportional** to net force and **inversely proportional** to mass of the object, right.

Let’s understand this statement in two cases.

**Case 1:** Acceleration is directly proportional to net force applied on the object.

Why is it difficult for this girl to accelerate the bicycle?

The reason is simple.

As the mass of the bicycle is more, **more force** is required to move it, right.

Therefore,

In this case, acceleration of the bicycle is **directly proportional** to the net force applied on it.

*(More the net force applied on the bicycle, the more easily it will accelerate further)*

**Case 2:** Acceleration is inversely proportional to mass of the object.

In the above case, as the mass of the bicycle is more, it requires more force to accelerate further.

Here the mass of the bicycle is less compared to above case.

(Because only one boy is sitting on the bicycle)

So, as the bicycle has **less mass,** it is easily accelerating further.

Therefore,

In this case, acceleration of the bicycle **inversely depends** upon its mass.

*(Less the mass of an object, the more easily it will accelerate further)*

### Example #5

How Newton’s second law of motion works, when you simply push the tray?

According to Newton’s 2^{nd} law,

Acceleration is **directly proportional** to net force and **inversely proportional** to mass of the object.

In this example, consider the tray as an object.

**Case 1:** Acceleration is directly proportional to net force applied on the object.

As the mass of the tray is more, **more force** is required to accelerate it, right.

Therefore, it is difficult for this boy to accelerate the tray further.

In short,

Acceleration of the tray **directly depends **upon the net force applied to it.

*(More the net force applied on the tray, the more it will accelerate further easily)*

**Case 2:** Acceleration is inversely proportional to mass of the object.

In the above case,

As the tray has more mass, it requires more force to accelerate further easily.

Now the question is, why is it easy for this boy to accelerate the tray?

The reason is,

Here the mass of the tray is less compared to the above case.

So, as the tray has **less mass,** it is easily accelerating further.

Therefore,

In this case, acceleration of the tray **inversely depends** upon its mass.

*(Less the mass of the tray, the more easily it will accelerate further)*

### Example #6

Do you know how Newton’s second law of motion works in the horse cart?

It’s so simple.

According to Newton’s second law of motion,

Acceleration is **directly proportional** to net force and **inversely proportional** to mass of the object, right.

In this example, consider the cart as an object.

As you can see the cart is not accelerating further easily, because it’s not easy for one single horse to pull the cart.

(As the mass of the cart is very large compared to one single horse)

In short, acceleration of the cart is **inversely proportional** to its mass.

Now, the cart accelerates further easily when two more horses pull the cart together.

The cart accelerates further easily because…

Whatever force applied on the cart by three horses together, is very large enough to accelerate the cart forward.

(More the force applied on the cart, the more it will accelerate further easily)

Therefore,

Acceleration of the cart is **directly proportional** to the net force applied on it.

### Example #7

How Newton’s second law of motion applies to a car?

Let’s make this simple.

As per the definition of Newton’s second law,

Acceleration is **directly proportional** to net force and **inversely proportional** to mass of the object.

In this example, consider the car as an object.

See this,

When the small boy pushes the car, it’s not easy for him to accelerate the car forward.

(As the mass of the car is very large compared to a small boy)

In short, acceleration of the car is **inversely proportional** to its mass.

Now when two boys are helping, the car accelerates further easily.

The question is, why does this car accelerate further easily?

It’s simple.

The force applied by two boys is very large enough to accelerate the car forward.

(More the force you apply on an object, the more it will accelerate further easily)

In short,

Acceleration of the car is **directly proportional** to the net force applied on it.

### Example #8

According to Newton’s second law of motion,

Acceleration is **directly proportional** to net force and **inversely proportional** to mass of the object.

In this example, consider a punching bag as an object.

Again, let’s consider two cases for better understanding.

**Case 1:** Acceleration is directly proportional to net force applied on the object.

When this guy hits the punching bag, the punching bag accelerates further easily.

Why?

The reason is simple.

This guy applies a very **large force** on the punching bag.

Therefore, acceleration of the punching bag is **directly proportional** to the net force applied on it.

*(More the force applied on the object, the more it will accelerate further)*

**Case 2:** Acceleration is inversely proportional to mass of the object.

In the above case, due to large force the punching bag accelerates very easily.

Now what happens if a small boy hits the punching bag?

See this,

The question is, why is this punching bag not accelerating easily as seen above?

Here also the boy is applying force, right.

The reason is,

The punching bag has **more mass **compared to the small boy.

Hence, acceleration of the punching bag **inversely depends** upon its mass.

*(More the mass of an object, less will be the acceleration of that object)*

Therefore,

In this case, this boy has to apply **more force.**

**........**Don’t you think, is easy to remember the statement of Newton’s second law of motion?

(Let me know by leaving a **comment**)