science

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/R2
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 as centripetal force.
This force acts along the radius and towards the center of the circle,
Centrifugal force arises when a body is moving actually along a circular path, by virtue of tendency
of the body to regain its natural straight line path. This force acts along the radius and away from the
center of the circle