1-5. For some applications such as an internal strut of an airplane wing we are more concerned with the strength and stiffness we get for a pound of material rather than the strength and stiffess themselves. We call the ratio of the strength to the weight, or rather . the density, the 1. A 10 long rod of material A with a square cross section of 2 2n breaks under a tensile load of 8,000 pounds. Its ultimate tensile strength is therefore 2 . This material has a density of 20 pounds per cubic foot. Material B has an ultimate tensile strength of 5,000psi and a density of 50 pounds per cubic foot. The material with the higher 1 is therefore 3 . If the rod of material A was 10.5 long when it broke its strain at that time was 4 . Materials with the highest 1.(a)absolutestrength1 (b) tensile strength (c) specific strength (d) shear strength (e) bend strength 2. (a) 2000 pounds (b) 2,000 psi (c) 800 psi (d) 4000 psi (e) 4000 pounds 3. (a) A (b) B (c) they are both the same (d) there is not enough information to say 4. (a) 0.05 (b) 5 (c) 5% (d) both a \& c are correct (e) both b \& c are correct 5. (a) elastomers (b) metals (c) composites (d) minerals (e) plastics