1) A brick building stands 130 ft tall. Each brick weighs 10 lb and has dimensions of 8 in. × 4 in. × 2in. What is the stress on the bottom layer of bricks? How tall could a building be before the elastic limit is reached?

2) If a 560 lb weight is hanging from a steel cable with a crosssectional area of 0.5 in. 2 and a length of 25 ft, how much will it stretch?