Question

What happens if there is no inertia?

Answer 1

Inertia is a property of matter that allows it to remain in its current state of rest or uniform motion in a straight line until it is perturbed by an external force. Newton's first law of motion is based on it. The quantity of inertia possessed by a given object is proportional to its mass. As a result, anything with mass has inertia.

Complete step-by-step solution:
Inertia in any motion, whether circular, translational, rotational, or otherwise, is simply the body's resistance to change its state of motion. When we consider the absence of inertia in any motion, it's difficult to explain because all of physics' principles fail to account for it. The inertia of the body is what gives us the most basic information about a body's state of motion. Now, because this is a hypothetical topic that is never realized, we can make numerous assumptions to describe it.
In linear motion, the mass of the body is also responsible for its inertia; therefore, if there had been no inertia, all bodies would have had no mass at all. For example, if there had been no inertia, the body would have started agitated and then come to a stop at random. Even a force of 1000N wouldn't have changed the state of motion or made the body travel the greatest distances it desires to if it wasn't in the need of the body.
In the absence of inertia, the electrons in the nucleus would have ceased to revolve, putting the matter's existence in jeopardy. At first glance, it appears as if the body would have started moving and come to rest even under vacuum and other controlled conditions and without the application of any force. When you don't measure or doubt the absence of inertia, you can come to a lot of conclusions.

Note:
Without any force exerted to it, a planet with no inertia may come to a halt or accelerate to great speeds. It wouldn't be able to locate an orbit either. The law of conservation of energy includes inertia as a fundamental feature. The planet and the universe would not exist without it.