Question
Physics Question on Periodic and oscillatory motions
A tunnel is dug along the diameter of the earth. A mass m is dropped into it. How much time does it take to cross the earth?
A
169.2 minutes
B
84.6 minutes
C
21.2 minutes
D
42.3 minutes
Answer
42.3 minutes
Explanation
Solution
The correct option is (D) : 42.3 minutes