Question on Class IX » Science » Gravitation » The Universal Law Of Gravitation. Q.1. When we move from the poles to the equator. Hence, the value of ‘ g ’ decreases. Why Ans: The shape of earth is an ellipse so when we move from the poles to the equator the radius of the earth R increases. Hence, the value of ‘ g ’ decreases because value 'g' is inversely proportional to the radius of earth. g = GM/R 2 Q. 2. What is the diffrence between centrifugal force and centripetal force? Ans: Centripetal Force (i) It is the force that keeps a body in circular path. (ii) It acts toward the center. Centrifugal Force (i) It is the pseudo force that tries to make a body fly off the circular path. (ii) It acts outward the center. Q.3. Explain :Centrifugal force and Centripetal force? Ans: A force which is required to move a body uniformly in a circle is known a
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