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21 Dec 2007 19:38:54 IST

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Relative motion

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We say that motion is a relative term. Then Earth revolves around the sun or sun revolves round the earth???

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A K

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Joined: 21 Dec 2007

Posts: 33

21 Dec 2007 19:41:21 IST

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they both revovle around a pt call the centre of mass of the two ....

raghav garg

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Joined: 16 Oct 2007

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21 Dec 2007 19:56:36 IST

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sun revolves around its own axis,

earth revolves around sun around its own axis

and theirfore its relative moton

Indzee ...

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Joined: 2 Dec 2007

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21 Dec 2007 22:24:22 IST

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Dude,

Everything that you observe depends upon the inertial reference frame you select. The laws are said to be laws, only if they are applicable when earth is considered as the inertial reference frame (So Earth is the universal reference frame).

That is the reason why you get different answers if you apply Newtons laws in different frame of references.

Lets consider the situation that you have given. If we consider earth as our inertial reference frame, then we will observe that the sun is revolving around the earth. But, if universe is considered as the inertial reference frame then, we observe earth revolving around the sun and also around itself.

Dude, for better and perfect understanding you better read the topic Inertial frames other than earth from HC Verma (Vol 1); Page no. 65; On right hand side.

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