Centripital and centrifugal forces

QuestionsCategory: High School PhysicsCentripital and centrifugal forces
deepanshu sharma asked 4 years ago
Profile photo of Abhishek Dta IIAbhishek Dta II replied 3 years ago

Do one thing tie the stone from two strings and and ask your friend to rotate it from your opposite side and see now if it follows elliptical orbit??Find it out yourself???

1 Answers
Best Answer
Ajinkya Ranade answered 4 years ago

The Earth does not simply revolve around the sun, it revolves around the common centre of mass of the Earth-Sun system. There is no common centre of mass for a stone tied to a string.
 
Secondly, the stone moves in a circle because of two forces – the centifugal force due to rotation and tension in the string – being in mutually opposite directions. However, there is no force of tension when the earth-sun system is studied, as gravity is a non contact force.