2. Procedure A. Conservation of mechanical energy To investigate the conservation of mechanical energy, take a small object of known mass (Example: tennis ball or any other round object). Neglecting air resistance and considering the ground as reference height, calculate the potential energy of the given object at a given height. Using the concept of conservation of mechanical energy, you will be able to calculate kinetic energy and total energy at different height with know values of potential energy. Finally, you Will calculate the speed of the object at different positions