I have two homework problems that I'm really stuck on. Can someone please help me out? Thanks! 1) A 0.55-kg block is hung from and stretches a spring that is attached to the ceiling. A second block is attached to the first one, and the amount that the spring stretches from its unstretched length triples. What is the mass of the second block? 2) A simple pendulum is made from a 0.655-m-long string and a small ball attached to its free end. The ball is pulled to one side through a small angle and then released from rest. After the ball is released, how much time elapses before it attains its greatest speed?