We don’t have any documented proof about a condition when an unstoppable force charged with infinite energy meets an immovable object which is not charged with boundless energy. 

In fact, this is a hypothetical case of science. This is more so as we don’t have records of this situation or case ever happening. In other words, it has never happened.

Immovable Object 5e Means

A stationary, unyielding force or object. I was sitting in the car, immobile and alone, as I watched her walk away.

An unstoppable force meets an immovable object

On examining the velocity or speed of an object, we find that there is nothing that cannot be stopped or made to stop due to circumstantial conditions. As a result, when such an object hits an immovable object, its speed or velocity comes to an end. 

When a bullet is fired, this object stops losing its velocity or speed on hitting an immovable object be it a wall or tree. The immovable item, when hit by an unstoppable force, does not change its position or location. 

For all practical purposes, we can say this is an academic subject relating to velocity or speed. But in reality, there is no unstoppable force that cannot be stopped with physical counter-force. Hence, this is a hypothesis. 

What happens when an unstoppable force meets an immovable object?

Totally paradoxical in nature, the skepticism is raised on the scientific ground that nothing practically can be unstoppable. Hence, the issue of an immovable object being hit by an unstoppable force just does not arise, at all. 

In fact, the basic doubt about the veracity of this arises out of the fact that how an object can be unstoppable? Even if the object is excessively powerful, charged by infinite electricity or power or force, it would stop when it hit an immovable object. 

In such a case, that unstoppable will lose its strength or speed on hitting or colliding with an object which is stationary or standing in one position, say a mountain, a tree or a house. The speed of the object will end in such a case of collision. 

Unstoppable force: A hypothesis of Science

Here the aspect of the mere hypothesis of an object being unstoppable due to its inherent force comes to light. As a theory of science, it seems improbable. This is more so as we don’t have any recorded example of it.  

Till now, we find all objects moving at a tremendous speed lose its velocity on hitting an immovable object. This is more an academic issue to study velocity in its real perspective than a reality.  

The primary reason for it, as explained above, is the fact that no object around the earth is unstoppable. Everything can stop when its inherent energy or electricity comes to an end. To exemplify, an aircraft or moving car would come to a stop when its fuel exhausts. When it collides with an immovable object, the movable object will destroy and come to an end with its speed getting zeroed.  

This is the normal theory of all speeding objects. We don’t have any historical evidence to suggest that an unstoppable force (other than planets in the galaxy moving on their axis and orbit with tremendous force that cannot be stopped) ever existed in any man-made scientific form.

In fact, an object is made to move or acquire speed or motion with the addition of external force, power or pull. But the force will lose its intensity if the movement of the external force or pull is stopped. It will no more be a moving object with speed. Subsequently, the question of an object being unstoppable does arise at all. 

In Conclusion:

To conclude, we can say velocity depends on external force. It is this external force that adds speed to an object. But this object cannot move eternally. Its speed will come to an end once the external assistance like fuel in the case of cars is exhausted. Hence, this is a purely hypothetical issue that hardly has any answer with scientific base.

Mass is defined as the amount or quantity of matter in an object or body. Every object that has a weight needs to necessarily have a mass. Both living and nonliving things can have a mass. A table, desk, computer, pencil, and cricket bat has a mass. 

It is the intrinsic nature of a mass, which makes a particular object light or heavy. 

How to find the mass of an object in Physics?

In Physics, mass refers to the intrinsic weight of matter in an object. The SI Unit of mass is kg or kilogram. 

Mass = Density (D) x Volume (V)

The most interesting aspect of mass is its consistency. The value of a mass remains constant all the time. It remains the same even in times of war, famine, earthquake, and change in geographical location. 

The SI unit of mass is called Kg or Kilogram, pounds, lbs, etc. You can convert every unit of mass to other units with a conversion trick. Mass measures how a body reacts to acceleration.

How to find the mass of an object formula?

You can trace the amount of mass in an object using these ways:

Mass = Density * Volume (m= ρV) ——— (i)

Mass = Force/ Acceleration (m= F÷A) —– (ii)

The acceleration of any object is directly related to the proportional force applied to it. Similarly, the amount of acceleration that is applied to a constant force remains proportional to the mass. 

Mass = Weight / Gravitational Acceleration (M= W÷G) —– (iii)

Weight refers to the product of mass and gravitational acceleration. You can use any of the above formulae to find a mass of a given object. 

What does the mass of an object measure?

The SI unit of a mass is KG. The mass of all objects is measured in Kg. The density of an object is calculated using the Greek letter ρ, which means mass per unit volume.

Even water has a mass and density. According to a scientific estimate, one cubic meter of water will have a mass of 977 kg. Similarly, we can also estimate the mass of any object if we know its volume and density.

For example, how much mass does 0.6m3 of water has?

We can solve it as follows:

Mass = D – Density * V – Volume

Here; Mass = 0.6 * 977 = 586 kg. 

You can solve other problems relating to finding out mass in a similar manner.

A neutron star also has a mass with a heavy density. An iota of a neutron star may have a few tonnes of mass equal to 100+ times of the earth.

How does Mass and Weight Vary?

Many people and students often get confused when it comes to mass and weight. But both of them denote two different things. However, many people still use them interchangeably—which is not right.

The mass of an object doesn’t transform its location from one side to the other. On the contrary, weight refers to the gravitational field in relation to a particular object or body. The gravitational field differs from object to object. 

Moon has a low gravitational field than the earth. So, obviously, the weight of an object varies from place to place. An object weighing 100-Kg here would weigh much less on the moon. That’s how the gravitational field matters.

In Conclusion:

Great scientist Albert Einstein proved that both mass and energy are two different things using the formula ‘E=MC².’

Here, E refers to energy while M denotes mass. And C is equal to the speed of light. C is equal to 299792458 m/s (3*10^8 m/s) in vacuum. 

The above theory shows that even a small amount of mass has an overwhelming quantum of energy. Thus, it demonstrated how mass and weights are two different things and shouldn’t be used interchangeably.