Answer:
potential energy: energy that is not released yet
ie. a yoyo before it's released, a book on a table before it falls, a roller coaster on the peak before it falls
kinetic energy: released energy
ie: moving car, windmill in motion
The answer is ensuring that risks are reasonable in relationship to anticipated benefits
When the principle of beneficence is applied to a study involving human subjects it is important to safeguard subjects in the experiment. No matter how important the anticipated benefits may be, the risks have to be reasonable to protect the people involved.