Skip to content
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
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! :)
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