Why do planet in solar system move around the sun in an elliptical orbit and not in any other shape (eg: circular or spiral)?
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because of centripetal force they revolve in elliptical orbit accn to Kepler's law of planatery motion
Himanshu153:
but why don't the planets escape the gravitational field?
it is because of binding energy of of all planet is is negative due to which it is bounded by the sun
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let's look at a experiment.......
take a sheet place it on 4 wooden blocks fitted at each corner
place a heavy object on the centre of sheet
now through some marbles...you will find that marble automatically start revolving in elliptical shape till they have motion.
because when marble are running toward the centre they get extra acceleratiom due to the pull force of centered mass and that's why covers a more distance.
that's why they move in this shape..
hope you understand..... because i want to keep it simple..... because if you are coming to talk about forces there are many...and i dont want to go in it.
take a sheet place it on 4 wooden blocks fitted at each corner
place a heavy object on the centre of sheet
now through some marbles...you will find that marble automatically start revolving in elliptical shape till they have motion.
because when marble are running toward the centre they get extra acceleratiom due to the pull force of centered mass and that's why covers a more distance.
that's why they move in this shape..
hope you understand..... because i want to keep it simple..... because if you are coming to talk about forces there are many...and i dont want to go in it.
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