Question

96. Which of the following statement
is small at all place on the surface of
earth. a)g is small at all place on tbe surface of earth
b) g has its maximum value at the equator.
c)g is less at tbe earths surface than at a height above or depth below it
d) g is greater at the poles than at the equator.​

Answer 1

Explanation:

The centrifugal force due to spinning of earth is maximum at the equator and vanishes at the poles. So, the effective gravitational acceleration is minimum at equator and maximum at poles.

The value of acceleration at height h is g

h

=

(R+h)

2

GM

and at depth d is g

d

=

(R−d)

2

GM

Thus, the value of g is more at the earth's surface than at a height above or a depth below.