For each drop-down box, select the appropriate word from the drop down that best completes the sentence. A person on a sled sliding down a hill is an example of the of energy. At the top of the hill when the sled is not moving, the person has zero energy. As the person moves down the hill, this energy is . At the bottom of the hill, when the sled is at its maximum speed, the person has zero energy. Overall, the energy is constant