# Please explain the answer 5) A mass m is connected to one end of a massless...

###### Question:

5) A mass m is connected to one end of a massless string of length L. The other end of the string is tied to a tall vertical pole of height H (much taller than L). The string is wound around the pole so that each wrap makes a small circle of the string and the mass touches the top of the pole. The mass is let go and the string begins to unwind. What is the angle @ that the rope makes with the pole when the mass reaches its maximum speed?