To prevent patients from electrical shock or injury the best practice is to

To prevent patients from electrical shock or injury, the best practice is to KEEP THE FLOOR IN PATIENTS' AREAS DRY.
The probably of receiving an electrical shock becomes higher when the floor in the patients' areas are wet; the human body conduct electricity more easily when water is present. 

The best way to prevent electric shock or injury are the following tips:

1. Cover sockets and outlets, especially if you have small children or pets. Never stick your hands or a metal utensil into a wall socket; the currents from an electrical shock can cause injury or even death.

2. Know the structure and requirements of your home.

3. Replace old or damaged equipment.

4. Store cords safely.

5. Don't overwhelm power strips or outlets.

6. Store and use electrical devices away from water.

7. Take precautions if doing electrical work.

When the ball is rising up, it gains kinetic energy. when the ball reaches the very top, it will have all potential energy, until it falls back down and gains it kinetic energy. finally when you catch the ball or it falls back down, it would have gained its potential energy back.