Identical twins have more similar sleep patterns than do fraternal twins, and north americans are averaging less sleep than their counterparts of a century ago. these facts best illustrate that sleep patterns are affected by both

When the ball is rising up, it gains kinetic energy. when the ball reaches the very top, it will have all potential energy, until it falls back down and gains it kinetic energy. finally when you catch the ball or it falls back down, it would have gained its potential energy back.