In science, mechanical energy is the sum of potential energy and kinetic energy. It is the energy associated with the motion and position of an object.The law of conservation of mechanical energy states that in an isolated system that is only subject to conservative forces the mechanical energy is constant.n science, mechanical energy is the sum of potential energy and kinetic energy. It is the energy associated with the motion and position of an object.
As with the standing shin stretch, the cross-over stretch is well-suited for pre- and post-running stretching. You can perform this stretch with or without shoes. Start standing with your feet together. Cross your right leg in front of your left leg and place the tops of your pointed right toes on the ground.
Stretch well. It is incredibly important to stretch before you attempt any gymnastics skill, even if you're only doing a simple somersault. To prepare for a backbend kickover, you'll need to stretch your ankles, your wrists, and your back. Here's what you should do: Stretch your wrists. Extend one hand with your palm away from you, as if you're saying stop, and pull back your fingers with the other hand until you feel a nice stretch in your wrist.