How is a planet formed and what forces act upon the planets when they are in orbit?

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I am struggling with physics p3 and just want to be sure of these things, i think that a centripetal and gravitational force act upon planets but i am not sure:) Thankyou for your help

Posted Mon 23rd May, 2011 @ 17:43 by Spongebob:)

2 Answers

  • 2 votes

A centripetal force acts on the planets - as they move in a elliptical orbit!

Gravity acts on every thing that has mass. A planet has a lot of mass so gravity acts upon the planet

A planet is formed by gravity acting on smaller particles of matter, rock and stuff bringing them together to form a larger object- a planet

Hope this helps! :)

Answered Mon 23rd May, 2011 @ 17:48 by Edward Pinches
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okay a planet is formed when a star dies and explodes and all that, this then makes more dust and gas and planets can form out of this.

so far i have not got a question on this in a past paper so it should be alright

the forces that act on the planet are gravity which puls it into the centre of the star - like out sun

Answered Mon 23rd May, 2011 @ 17:49 by Hannah