Answer :
Final answer:
The axial pull acting on the bar, which consists of three sections with varying lengths and diameters, remains 40000N as the pull or tension force is uniformly distributed throughout the entire length of the bar. Therefore the correct answer is: A)
Explanation:
The axial pull on the bar is essentially the tension force acting along the length of the bar due to the external force applied on it. Considering the information provided, the axial pull acting on the bar remains 40000N irrespective of the bar's sections, their lengths, and diameters since the pull or tension force is equally transmitted throughout the entire length of the bar as long as the bar remains elastic and does not reach its yield strength.
"Axial pull" refers to a type of force exerted along the axis of an object or structure. In engineering and physics, axial pull is often discussed in the context of tension and compression forces.
Tension: When a force is applied to stretch an object, pulling it apart along its axis, it's referred to as tension. For example, when you pull on both ends of a rubber band, you're applying axial tension to it.
Compression: Conversely, when a force is applied to push or squeeze an object along its axis, it's called compression. Think of pressing down on a spring; you're applying axial compression.
