What is the weight of the rock to be moved with a pry bar?

The question asks for the weight of the rock that needs to be moved with a pry bar. A pry bar is a common tool used in manual labor to leverage and move heavy objects, and the weight of the object is crucial for understanding how to effectively use this tool without causing injury or damage.

The choice indicating 150 kg as the weight of the rock suggests that it is a moderately heavy object, which falls within a typical range that would require a pry bar to lift or move safely. When dealing with objects in this weight range, proper techniques such as placing the pry bar at the correct angle and using body strength efficiently become important to manage the load effectively.

In practical terms, if a rock weighs 150 kg, the user must consider factors like leverage, the position of the pry bar, and their personal strength, as these elements will determine how successfully and safely they can move the rock. For objects heavier than this, additional assistance or tools may be required, while lighter weights may not necessitate the use of a pry bar at all.

Other options, such as 100 kg, 200 kg, and 50 kg, either represent weights that are too light or too heavy for effective movement using just a pry bar, thus making 150