Mechanical energy refers to the sum of potential energy and kinetic energy in a system. It represents the ability of an object or system to do work.
Potential energy is stored energy that an object possesses due to its position or condition.
Kinetic Energy: Kinetic energy is the energy possessed by an object due to its motion.
Conservation of energy states that within a closed system, mechanical energy remains constant, meaning it can neither be created nor destroyed, only transferred or transformed.