A pendulum with a mass M swings and picks up a piece of clay of mass m at the bottom of its swing. Which of the following statements is correct? The combined mass rises to the same height that mass M was released.
The total mechanical energy of the system is unchanged by the collision.
If M = m, then the height it reaches after the collision is half that before the collision.
If M = m, then the height it reaches after the collision is 1/4 that before the collision.
If M = m, then it rises to twice the height it had before the collision.