I meaning in Space Science ?

Answer:

What is Inertia mean?

Inertia is the resistance of any physical object to any change in its velocity. This includes changes to the object's speed, or direction of motion. An aspect of this property is the tendency of objects to keep moving in a straight line at a constant speed, when no forces act upon them.

Inertia comes from the Latin word, iners, meaning idle, sluggish. Inertia is one of the primary manifestations of mass, which is a quantitative property of physical systems. Isaac Newton defined inertia as a force, before his first law in the monumental Philosophiæ Naturalis Principia Mathematica. There, one reads:

DEFINITION III. The vis insita, or innate force of matter, is a power of resisting by which every body, as much as in it lies, endeavours to persevere in its present state, whether it be of rest or of moving uniformly forward in a right line.

After some other definitions, Newton states (at page 83) his first law of motion:

LAW I. Every body perseveres in its state of rest, or of uniform motion in a right line, unless it is compelled to change that state by forces impressed thereon.

Note that Newton makes use of the active verbal form "to persevere", rather than other passive forms such as "to continue", or "to remain", commonly found in modern textbooks. This follows from some changes in Newton's original mechanics (as stated in the Principia) made by Euler, d'Alembert, and other Cartesians.

In common usage, the term "inertia" may refer to an object's "amount of resistance to change in velocity" or for simpler terms, "resistance to a change in motion" (which is quantified by its mass), or sometimes to its momentum, depending on the context. The term "inertia" is more properly understood as shorthand for "the principle of inertia" as described by Newton in his first law of motion, stated above, according to which an object will continue moving at its current velocity until some force causes its speed or direction to change.

On the surface of the Earth, inertia is often masked by gravity and the effects of friction and air resistance, both of which tend to decrease the speed of moving objects (commonly to the point of rest). This misled the philosopher Aristotle to believe that objects would move only as long as force was applied to them.

The principle of inertia is one of the fundamental principles in classical physics that are still used today to describe the motion of objects and how they are affected by the applied forces on them.

reference

Full Form	Category
Ice	Academic & Science
Idiosyncratic	Academic & Science
Interest	Accounts and Finance
Innovation	Business
Inlay	Business
Iodine	Chemistry
Intercession	Community
Intra (Q6/16, VCEG)	Computer and Networking
In	Computer Hardware
Incinerator	Computing
Insecure	Computing
Intensity	Electronics
Inclusive	Electronics
Amperage	Electronics
Information	Email
Phase Vocorder Analysis Data	File Type
Borland C Preprocessor, Preprocessor Output File	File Type
Incubate	General
Identical	Governmental
Intimidated	Governmental
Inebriation	Governmental
Integrity	Governmental
Intersection	Governmental
Internationalism	Governmental
Inălţime	International
SERIOUS INJURY - SEND DOCTOR	International
Inaltime	International
Inverted	Maths
Roman Numeral 1	Maths
Irritant	Medical
Irresistible	Messaging
Individual	Military and Defence
Intelligence Fusion (integrator)	Military and Defence
Independent	Military and Defence
Immediate	Military and Defence
Input	Networking
Integrated	Softwares
Injection	Space Science
Inertia	Space Science
Inner	Space Science
Irradiated	Space Science
Ineligible	Sports
Interference	Sports