IFR meaning in Academic & Science ?

Answer:

What is Inertial Frame of Reference mean?

In classical physics and special relativity, an inertial frame of reference is a frame of reference that is not undergoing acceleration. In an inertial frame of reference, a physical object with zero net force acting on it moves with a constant velocity (which might be zero)—or, equivalently, it is a frame of reference in which Newton's first law of motion holds. An inertial frame of reference can be defined in analytical terms as a frame of reference that describes time and space homogeneously, isotropically, and in a time-independent manner. Conceptually, the physics of a system in an inertial frame have no causes external to the system. An inertial frame of reference may also be called an inertial reference frame, inertial frame, Galilean reference frame, or inertial space.

All inertial frames are in a state of constant, rectilinear motion with respect to one another; an accelerometer moving with any of them would detect zero acceleration. Measurements in one inertial frame can be converted to measurements in another by a simple transformation (the Galilean transformation in Newtonian physics and the Lorentz transformation in special relativity). In general relativity, in any region small enough for the curvature of spacetime and tidal forces to be negligible, one can find a set of inertial frames that approximately describe that region.

In a non-inertial reference frame in classical physics and special relativity, the physics of a system vary depending on the acceleration of that frame with respect to an inertial frame, and the usual physical forces must be supplemented by fictitious forces. In contrast, systems in general relativity don't have external causes, because of the principle of geodesic motion. In classical physics, for example, a ball dropped towards the ground does not go exactly straight down because the Earth is rotating, which means the frame of reference of an observer on Earth is not inertial. The physics must account for the Coriolis effect—in this case thought of as a force—to predict the horizontal motion. Another example of such a fictitious force associated with rotating reference frames is the centrifugal effect, or centrifugal force.

reference

Full Form	Category
Internal Floating Roof	Academic & Science
Inertial Frame of Reference	Academic & Science
Investment Fluctuation Reserve	Banking
Issued For Review	Business
Income Fund Reimbursable	Business
Interrupt Flag Register	Computer Assembly Language
Iris Frame Relay	Computing
Interleaved Frame Recording	Computing
in-Band Frame Rendering	Computing
Interactive Fax Response	Computing
Industrial Frame Router	Computing
Isochronous Frame Reference	Computing
Increasing Failure Rate	Electronics
Integral Fast Reactor	General
Instrument Flight Rule	General
International Financing Review	General
Instituto Familiar de la Raza	General
Institute of Food Research	General
Inherently Flame Resistant	General
In Flight Refueling	General
Inherent Flame Retardant	General
Inherently Flame Retardent	General
Integrated Fabric Resource	General
Interior Furniture Resources	General
I Freaking Rule	General
Ignacio Fernandez Racing	General
Interim Final Rule	Governmental
I Follow Roads	Governmental
Instructional Flight Regulations	Governmental
Institute for Fisheries Resources	Governmental
Institute for Field Research	Governmental
International Federation of Robotics	Governmental
In-Flight Refuelling	Governmental
Ideal Final Result	Internet
Inspiratory Flow Rate	Medical
Individual Funding Request	Medical
isoflavone reductase	Medical
Instrument Flight Rules	Space Science
International Finals Rodeo	Sports