6. A spring pendulum on a horizontal plane has a spring constant $k$, a mass $m_0$ attached to it, and an amplitude $A$. A small object with mass $m$ falls freely from a height $h$. When the pendulum is at its maximum displacement, the object coincidentally lands on $m_0$ and sticks to it. In this scenario, how do the system's oscillation period, amplitude, and vibrational energy change? Additionally, if the small object lands on $m$ when the pendulum reaches its equilibrium position, how do these quantities change?