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WHAT IS A PSEUDO FORCE?

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2 Nov 2011 20:12:46 IST
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2 Nov 2011 20:12:46 IST
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WHAT IS A PSEUDO FORCE?
Engineering Entrance , JEE Main , JEE Main & Advanced , Physics

PSEUDO FORCE

If a body is at rest or in uniform motion in a straight line it will continue to do so unless compelled by an external unbalanced force.

==> The above statement is valid only when you observe from non-accelerated frames.

==> If you observe the motion from earth , the above statement is valid at earth , so at earth above statement is known as NEWTON single quotes FIRST LAW.

==> Mean above statement is a definition of frame in which law of Inertia is valid and these frames are known as Inertial frames (Non accelerated Frames)

==> Means If we are not observing the motion from inertial frame ,above statement will not valid.

==> Such  a frames are known as Non Inertial Frames (Accelerated Frame)

==> Actually Newton Wanted  to apply the above Condition (Give in the Statement) ,So he gives the concept of PSEUDO FORCE.

==> First of all you must know that PSEUDO FORCE is a Imaginary force ,it is not  a real force (Like ,Gravitational force ,Electromagnetic force ).

==> We will understand PSEUDO FORCE  through an .....

PSEUDO FORCE EXAMPLE:

==> We have two observers A and B and two boxes A and B .Person B and box B are on Platform (at rest ) and Person A and Box A are in the train (At rest with respect to train).

==> Train is moving towards right with constant acceleration .

==> Now we will observe Boxes A and  B from two frames (train and Platform)

You can observe that from trainsinglequotes frame  is not valid(Quantitative relation between      and  , as said in NEWTONsinglequoteS first law).

=> Note

You must know that Real Force on box A in the horizontal direction is static friction (fs) and  is acceleration of train .

=> Newton introduced PSEUDO force so that one could apply   , even from accelerated frames(Non Inertial Frames)

=> SEE HOW :

If person A observe Box A...........
, From expression (1)

Note:

(-) Sign shows that  is towards left.

==> Now you can observe PSEUDO FORCE when person (A) observe box (B)

In this way we can understand How to apply PSEUDO force.

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BEST EXPLAINED TOPIC THAT I HAVE EVER SEEN

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7 Nov 2011 08:09:40 IST
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THANK U DUDE!

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