Materials

3. Mass per unit volume of the substance
4. The extension of a spring is proportional to the force needed to extend it
5. limit Point beyond which a wire is permanently stretched
8. Property of a solid that enables it to regain its shape after it has been deformed or distorted
12. Tensile stress needed to break a solid material
13. Force per unit area of cross-section in a solid perpendicular to the cross-section
14. Extension per unit length of a solid when deformed

1. tensile stress/tensile strain (assuming the limit of proportionality has not been exceeded)
2. Tensile stress needed to break a solid material
6. The limit beyond which, when a wire or spring is stretched, its extension is no longer proportional to the force that stretches it
7. Stretches easily without breaking
9. The force per unit extension needed to extend a wire or a spring
10. Deformation of a solid beyond its elastic limit
11. Snaps without stretching or bending when subject to stress