A body of mass 4.9 kg hangs from a spring and oscillates with a period 0.5 s. On the removal of the body, the spring is shortened by
(Take g = 10 `ms^(-2), pi^(2)` = 10)

Options

A. 6.3 m
B. 0.63 m
C. 6.25 cm
D. 63 cm

Answer

C

Explanation

`T = 2pi sqrt((m)/(k))`
F = mg = kx