Final answer:
To assist an unconscious victim in water, remove them first before starting CPR. Use physics principles to solve problems related to rescue interventions, such as calculating the height of a thrown life preserver and the force to create sufficient gauge pressure for forced air resuscitation.
Step-by-step explanation:
When approaching a victim who is vertical in the water and appears to be unconscious, it is crucial to first remove the victim from the water before attempting any other rescue procedures like CPR. Myths such as starting CPR immediately in the water or assuming loud calls for help to identify a drowning person are misleading.
The reality is that an unconscious person can still be revived if the airway is sealed and CPR is administered promptly on stable ground. To address a physics problem involving a rescue helicopter, one could calculate the height from which a life preserver was dropped based on the knowns: initial velocity, time to reach the water, and acceleration due to gravity.
For the third part related to delivering forced air into an unconscious victim's lungs via a balloon, the required force can be determined using gauge pressure and the effective area of force application.