A string of length 2l and negligible mass is attached to a fixed point at one end and a small object of mass m at the other end. The string is initially horizontal and taut. The object is then given a small horizontal displacement and released. What is the motion of the object?
1) The object will oscillate back and forth along the horizontal line
2) The object will move in a circular path
3) The object will move in a straight line
4) The object will remain at rest