Question

A simple pendulum has a time period of 1.0 sec at the earth's surface. It is taken a
height Re/2 above the earth's surface, where Re is the radius of the earth. The time
period is
(A) 1.5 sec.
(B) 2.5 sec.
(C) 3.25 sec
(D) none of these.​

Answer 1

Answer:

option B

as we go above surface g decrease and so time period increase.