Final answer:
An exact answer about the maximum vertical load for a metal shore requires specific details from the manufacturer, which are not provided. The physics of materials and their structural strength are important in this context, but cannot be applied without the necessary information.
Step-by-step explanation:
The student's question pertains to the structural strength of a metal shore, which is an engineering concern, often addressed within the field of physics, particularly when dealing with statics and material strength. Without specific information about the metal used in the shore, the grade it was designed to handle, and other engineering details, it's not possible to accurately determine the maximum vertical load that a 3 ft to 5 ft metal shore can withstand when fully collapsed. However, it's important to note that in practice, these specifications would be provided by the manufacturer based on testing and calculations that take into account the material properties, shore design, and safety factors.
For example, in the case of the hollow aluminum flagpole from the provided information, the bending of the pole in response to a horizontal force could be calculated using the formula for deflection of a beam. However, this involves complex engineering formulas and is not directly related to shores. The result of the deflection of the flagpole is dependent on factors such as the moment of inertia, material properties like Young's modulus, and the geometry of the pole.