Final answer:
Core objects in a rescue situation especially in fires or water-related incidents include life preservers, fire-resistant clothing, breathing apparatus, and two-way radios. The example of a rescue helicopter throwing a life preserver illustrates the practical application of physics in calculating the height from which the object was dropped, important for coordinating rescue efforts.
Step-by-step explanation:
In any rescue situation, especially when dealing with calamities such as fires or water-related incidents, there are core objects that are crucial for the success of the operation. These core objects include:
- Life preservers - To ensure the safety of individuals in water hazards, such as those overboard from a sinking boat.
- Fire-resistant clothing - For rescuers entering burning buildings to shield them from fire and heat.
- Breathing apparatus - To provide oxygen to rescuers navigating through smoke-filled environments.
- Two-way radios - To assess situations and communicate for instructions and coordination during the rescue.
To illustrate, consider a scenario where a rescue helicopter is involved in saving a person whose boat has sunk. The rescuer aboard the helicopter throws a life preserver with an initial velocity of 1.40 m/s down to the victim, which takes 1.8 seconds to reach the water. In this problem, knowns include the initial velocity (1.40 m/s), time of fall (1.8 s), and acceleration due to gravity (9.81 m/s2). With these knowns, we can calculate the height from which the preserver was released using the kinematic equation:
h = v0t + 0.5at2
Where h is the height, v0 is the initial velocity, t is the time, and a is the acceleration.