Shear reduction in rope systems is achieved by what mechanism?

Shear reduction in rope systems is achieved by what mechanism?

• A. Reducing friction by using smoother surfaces
• B. Increasing the rope diameter
• C. Maintaining a greater breaking strength by increasing the surface area with which the rope comes in contact
• D. Shortening the rope length

Answer: (C)

Maximizing the surface area the rope touches distributes the load more evenly and increases friction at contact points. When a rope bends or sits on a surface, concentrated stresses—shear—can weaken fibers if the contact is sharp or limited. By increasing the contact area, more fibers share the load and friction resists sliding, so the system preserves the rope’s effective breaking strength under load. The other ideas don’t address how load is spread or resisted across the rope-surface interface: smoother surfaces reduce friction (which could increase shear), simply making the rope thicker doesn’t directly reduce localized shear stresses, and shortening the rope doesn’t change how stress is distributed along contact points.

Maximizing the surface area the rope touches distributes the load more evenly and increases friction at contact points. When a rope bends or sits on a surface, concentrated stresses—shear—can weaken fibers if the contact is sharp or limited. By increasing the contact area, more fibers share the load and friction resists sliding, so the system preserves the rope’s effective breaking strength under load.

The other ideas don’t address how load is spread or resisted across the rope-surface interface: smoother surfaces reduce friction (which could increase shear), simply making the rope thicker doesn’t directly reduce localized shear stresses, and shortening the rope doesn’t change how stress is distributed along contact points.