Question
Physics Question on Gravitation
The time period of a simple pendulum on the surface of the earth is 4s. Its time period on the surface of the moon is
A
4s
B
8s
C
10s
D
12s
Answer
10s
Explanation
Solution
Acceleration due to gravity on the surface of the moon is 61 that of surface of the earth ∴gm=61ge…(i) On earth, Te=2πgeL On moon, Tm=2πgmL ∴TeTm=gmge=6 (Using (i)) Tm=6Te =6×4s =10s