Energy is mainly classified into two types. Kinetic Energy and Potential Energy.
The formula to determine the Kinetic energy of an object is - K.E = ½ mv² [ where,m= Mass of the object, V = The velocity of the object]. The formula to determine the Potential energy of an object is - P.E = mgh, Where m denotes the object's mass, g denotes gravitational acceleration, and h denotes height.