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CBSE Class 9 Answered

The earth is acted upon by gravitation of the sun,even though it does not fall into the sun.why?
Asked by Pawanpradhan2003 | 19 Feb, 2018, 07:06: PM
answered-by-expert Expert Answer
- The Earth is not lieing stationary, it is involving around the Sun in an elliptical orbit.
- Had it been stationary, then the probability of the Earth falling on to the Sun due to gravity would have been higher.
- The Sun's gravitational pull is used to provide centripetal force in circular (elliptical) motion whereas, the mass of the Earth provides 
the centrifugal force in this revolution.
- So there is almost a balance between the centrifugal and the centripetal force that prevents the Earth from collapsing onto the Sun due to its gravitational pull.
Answered by Abhijeet Mishra | 19 Feb, 2018, 07:25: PM

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