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Examples of Newton's Three Laws of Motion





Sir Isaac Newton, the English physicist and mathematician whose name is still revered to and quoted by many around the world, is well known for his contributions in these two fields.
He is known for making many ground breaking theories such as Infinitesimal Calculus, Universal gravitation, Newtonian mechanics and Optics Binomial series. 
But out of all these he is known for his three laws of motion. 
So let us understand this concept with a few examples of Newton’s three laws of motion.

The first law is also known as law of inertia and it says that a body will tend to be in rest or in motion unless it is subjected to an external force. 
The following example is the first part of all the examples of Newton’s three laws of motion.

Consider the following scenario. If you keep a glass full of water on a table in your home where there is no air flowing what will happen to the water level? It will remain the same right?  Yes that is because there is no external force acting upon it. 
But if we were to insert our finger in the glass or turn on a table fan nearby then the water in the glass will start shaking and will spill out of the glass. 
This is because the water which was in a state of rest wants to continue to be in the state of rest and therefore it will push the excess water outside so that it can return to its original state of rest.

The second law of motion states that acceleration is produced when a force acts on a mass. The more the mass the greater the force required to push it. The second law of motion gives us the famous expression F = ma (where F is force, m is mass and a is acceleration).

Let us now see the second part to the examples of Newton’s three laws of motion. Why do you think it’s easier to push away a slim person than a fat person? In same breath, why do you think it is easier to kick a football than a bowling ball? 
The answer lies with Newton’s second law of motion. It’s because a fat person has more mass and hence to make him move one has to exert a greater force. 
Similarly the mass of a bowling ball is much more than the mass of a football so to make it move a greater force is required.
 
The third law of motion which many of us would have heard of is for every action there is an equally opposite reaction. 
The following examples are for the third and final part of the examples of Newton’s three laws of motion. 
When a fireman opens the nozzle of the water pipe connected to the fire preventive unit, he usually goes a few steps backward. 
This is because the water that is forced out the water nozzle exerts an equally opposite force to the water hose due to which the fire personnel is pushed backward. 
Even a text book lying on the floor is an example of this law. If the book exerts a force of say 10 Newton on the floor then the floor also exerts and equally opposite force of 10 Newton onto the book.

Even when we are standing still on the ground, the ground is actually exerting an equally opposite force exactly equal to our weight.
With these simple examples of Newton’s three laws of motion we can understand that it is something which we can see and apply in our daily lives. Most of the things we do are examples to these three laws. 
Hope this article has given you a new perspective in looking at your world and made you understand the three laws of motion better.