One end of a string is attached to an object of mass .5 kg , and the other end of the string is secured so that the object is at rest as it hangs from the string above the ground, as shown in the figure. The object is then pulled to an unknown height above the ground. The object is then released from rest. The speed of the pendulum at the position shown in the figure is when it undergoes simple harmonic motion. What is the approximate change in the gravitational potential energy of the pendulum-Earth system from the pendulum’s maximum height to the position where its speed is ? Responses