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IIT JEE > Learn IIT JEE Coaching > In case of a rotational motion (Rigid body Dynamics),...
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In case of a rotational motion (Rigid body Dynamics), we can always apply Newtan's laws of motion about an axis passing through the Center of Mass of body. Why? Why can't we always apply Newtans' laws of motion about an axis about which the rigid body happens to be in pure rotation?

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For a body in rotation the center of mass is the only point which remains in transient motion, rest others are in rotation.
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For a body in rotation the center of mass is the only point which remains in transient motion, rest others are in rotation.
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For a body in rotation the center of mass is the only point which remains in transient motion, rest others are in rotation.
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For a body in rotation the center of mass is the only point which remains in transient motion, rest others are in rotation
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Spoken English, BTech Tuition, C Language, C++ Language, CAD etc., with 4 years of experience

NLM is invalid for non-inertial frames of ref.
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For translation motion net force about centre of mass should be non zero. If a body has non zero net force along any direction passing through c.m will experience acceleration.
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For a body in rotation the center of mass is the only point which remains in transient motion, rest others are in rotation.
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BE, R V College Of Engineering, Bangalore.

it is because the whole mass of the body is supposed to be concentrated at the centre of mass and the force at the centre of mass cause an acceleration of the rigid body.so we need to apply the newton's law about an axis passing through centre of mass. if we apply newton's law about an axis...
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it is because the whole mass of the body is supposed to be concentrated at the centre of mass and the force at the centre of mass cause an acceleration of the rigid body.so we need to apply the newton's law about an axis passing through centre of mass. if we apply newton's law about an axis other than centre of mass then whole mass is not supposed to move.bcz that is not centre of mass.so newton's law is not applicable over there. read less
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Newtons laws are valid for only inertial frames of reference...They arebinvalid for non inertial frames of reference..
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1) newtons laws of motion are valid only in inertial frame of reference,i.e, a frame in which there is zero acceleration(though velocity may have non-zero but constant value) . 2) the whole mass of the body can be assumed to be at its centre of mass and the object can then be treated as a point object...
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1) newtons laws of motion are valid only in inertial frame of reference,i.e, a frame in which there is zero acceleration(though velocity may have non-zero but constant value) . 2) the whole mass of the body can be assumed to be at its centre of mass and the object can then be treated as a point object and newtons lawa can then be applied read less
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