A 1.00 m-high retaining wall is built out of concrete blocks. Each block weighs 22.2 N and has dimensions of 20.3 cm 9.20 cm 5.60 cm. Estimate the minimum volume stress on a block at the very bottom layer of the wall. Assume that the largest surface areas of blocks are facing each other, the height of the wall cannot exceed 1.00 m, and ignore the thin layer of cement between those faces. A) 2.0210⁴N/m² B) 1.9010⁴ N/m² C) 2.1410⁴ N/m² D) 3.4510⁵N/m² E) 1.87 N/m²

Question

Quizplus · Accepted Answer

The minimum volume stress is calculated by dividing the weight of the block by the area of the largest face. The area is 20.3 cm x 9.20 cm = 0.0203 m x 0.0920 m = 0.0018676 m². The stress is 22.2 N / 0.0018676 m² = 1.9010⁴ N/m².

A 100 M-High Retaining Wall Is Built Out of Concrete Blocks