What is Inertial and Non-inertial Frame of Reference?
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What is Inertial and Non-inertial Frame of Reference?

October 16, 2019


In this video we are going to learn about
inertial and accelerated frames of references First one. Inertial frames of reference. Frames of references where Newton’s Laws are applicable
is called as Inertial frames of reference The simplest example being Earth
All the Newton’s laws are applicable when we consider motion with respect to Earth
So Earth becomes our simplest IFR Frame of reference atrest or going at constant
velocity with respect to inertial frame of reference is also called as IFR
So any object which is at rest or it is going with a constant velocity with
respect to Earth then such a frame of reference will also be called as inertial frame of
reference For example a bus moving with constant velocity
with respect to the Earth then it will be called as inertial frame of reference
Next one accelerated frames of reference Frame of reference accelerating With respect
to inertial frame of reference is called accelerated frame of reference
For example a bus accelerating or decelerating with respect to Earth will be termed as AFR
Also a bus accelerating with respect to another bus which is moving with a constant velocity
is also termed as AFR Now let us try a few examples to understand
whether the given system is AFR or IFR One question you have to ask is
Whether Newton’s laws are valid or not The first one train speeding at hundred kilometers
per hour The train is speeding at hundred kilometers
per hour means it is moving at constant speed so it is inertial frame of reference. The laws are valid Next one merry go round anyone who has seen
a merry-go-round knows that it turns at a constant speed but at each and every point
the direction keeps on changing hence it is AFR Next one. A car taking a turn a car taking a turn A car taking a turn a car taking a turn has changes in velocity as well as acceleration
hence it’s AFR Sudden brake in a car
A car moving with constant speed and suddenly stopping has decelerated with respect to Earth
hence it is also AFR Last one hovering balloon a balloon hovering
over the given point is considered to be at rest with respect to
Earth hence it is IFR So now you get the general idea about AFR
or IFR We are going to apply this concept in problems
involving objects moving up and down in an elevator pendulum suspended in a moving or
accelerating elevator Or cases like this where a bag is lying on a
top of a speeding car and to find out whether it will slide off or not

Only registered users can comment.

  1. if we consider a bus travelling at constant velocity in India and similarly one in England does that mean they are in different inertial frame of reference .(acceleration is different for each bus)

    In fact since rotation is the universal norm is an inertial frame of reference possible ?
    Then since angular momentum is conserved what was the source of the rotation.

    I am an duff einsteinian.
    something wrong somewhere !

  2. Sir agr body k mass zyada ho aor F kum ho to is m acceleration produced nhi ho ga to kya is pr second law apply kry ga please reply

  3. For a train speeding at 100km/h the wording makes it sound like the train has acceleration. I think you meant to say the train has a speed of 100km/h not speeding

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