There is a small hole in a table. A string of length lm passes through it. Two bodies of masses 70g and 100 g are attached at its ends. The lOOg mass hangs freely at a depth of 60 cm from the table. If this mass is to be in equilibrium, the other mass should rotate in a circle with a frequency equal to

Options

A. `(4pi//140)` Hz
B. `pi//140 Hz`
C. `pi//sqrt(140)` Hz
D. `sqrt(140)/(4pi) Hz`

Answer

D