Physics KE PE and CoE
The Kinetic Energy of a object is the energy a object possesses in motion. kinetic energy is defied as the work needed to accelerate a body from rest to a stated velocity. This body maintains its speed unless acted upon by a unbalanced force. It requires the same amount of work to get the said body to rest.
Potential Energy is stored energy, ready to be released at at any time. In the case of a bow and arrow, the energy is converted from the potential energy in the archer's arm to the potential energy in the bent limbs of the bow when the string is drawn back. When the string is released, the potential energy in the bow limbs is transferred back through the string to become kinetic energy in the arrow as it takes flight.
Conservation of Energy
In physics, the law of conservation of energy states that the total energy of an isolated system cannot change—it is said to be conserved over time. Energy can be neither created nor destroyed, but can change form, for instance chemical energy can be converted to kinetic energy in the explosion of a stick of dynamite.