Sarthaks Test
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(a) Earth can be thought of as a sphere of radius 6400 km. Any object (or a person) is performing circular motion around the axis of earth due to earth’s rotation (period 1 day). What is acceleration of object on the surface of the earth (at equator) towards its centre? what is it at latitude θ? How does these accelerations compare with g = 9.8 m/s2?

(b) Earth also moves in circular orbit around sun once every year with on orbital radius of 1.5 x1011m . What is the acceleration of earth (or any object on the surface of the earth) towards the centre of the sun? How does this acceleration compare with g = 9.8 m/s2?

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1 Answer

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by (13.6k points)

Acceleration v2/R = 4π2R/T2 

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