Final answer:
As a worker climbs a ladder, their potential energy increases due to working against gravity. Descending the ladder releases this energy step by step. Safe foot placement on each rung is crucial to prevent a fall and potential sudden energy release. option 1 is correct
Step-by-step explanation:
Option 1 is correct When a worker climbs up a ladder, they are exerting energy to work against gravity, which increases their potential energy with every step they take upward. As the worker ascends, the potential energy accumulates because they are moving further from the ground, which is the reference point for potential energy in this context. When the worker descends, they release this potential energy gradually with each step down. It's important to note that there are no intermediate positions when climbing a ladder; a foot must be securely placed on a rung, or the worker risks falling, which could result in the sudden release of potential energy all at once in an uncontrolled manner.
The three types of ladders that can be found at a worksite are:
Step ladder: This type of ladder has steps on one side and is self-supporting, making it easy to use without leaning against a wall or structure.
Extension ladder: It consists of two or more sections that can slide out and lock into place, allowing you to reach greater heights. It is leaned against a wall or structure for support.
Platform ladder: This ladder has a platform at the top, providing a stable and secure working area. It is also self-supporting and can be used without leaning against a wall or structure.