Question: The value of g is_____at poles (A). Maximum (B). Minimum (C). Same (D). Can’t say...

Question

The value of g is_____at poles
(A). Maximum
(B). Minimum
(C). Same
(D). Can’t say

Answer 1

Solution

Hint: Before attempting this question one must have prior knowledge of gravity and acceleration due to gravity and remember that the symbol g in the question represents the acceleration due to gravity, use this given information to approach towards the solution to the question.

Complete step-by-step solution -
Before approaching the solution let’s discuss about the acceleration due to gravity and the symbol g mentioned in the question
So the symbol g is the representation of acceleration due to gravity which can be explained as the rate in change in acceleration of a body due to the gravitational force experienced by the body due to earth.
Whereas the gravitational force can be explained as the force exerted by 2 masses on each other it means in the universe having mass exert some force on each other and that force is named as the gravitational force.
So now discussing what is poles and what is the value of acceleration due to gravity at poles.
Poles are the points where the axis of rotation lie of a rotating body such as earth
We know that the value of g at poles is maximum since we know that earth doesn’t have a perfect circular shape and its shape is more like an ellipse due to which its radius is smaller at the poles as compare to other parts of earth and we also know that the acceleration due to gravity is inversely proportional to the radius of the earth by the equation $g = \dfrac{{GM}}{{{r^2}}}$ here M is the mass of earth, r is the radius of the earth and G is the gravitational constant.
Since the value of g is maximum at poles of earth
Hence option A is the correct option.

Note: In the above solution we discussed about the poles and the value of g at poles but do you know that as the value of g is maximum at poles but at equator of value of g is less than the poles because of the value of radius of earth is greater at the equator thus it means the value of g depends upon the shape of earth and the position of body on the earth.