Two blocks of masses `m_1` and `m_2` are attached to the lower end of a light vertical spring of force constant k. The upper end of the spring is fixed. When the system is in equilibrium, the lower block `(m_2)` drops off. The other block `(m_1)` will

Options

A. remain undistrubed
B. move through a distance `(m_2g)/(k)` and come to rest
C. undergo vertical SHM with a time period of `2pisqrt(m_1/k)`
D. undergo vertical SHM with a time period of
`2pisqrt((m_1+m_2)/(k))`

Answer

C

Explanation

`T=2pisqrt(m_1//k)`