🔍 Key Concepts

• Types of stress in materials: tensile, compressive, shear • Difference between stress (the force per unit area) and strain (the deformation caused by stress) • How forces acting parallel but opposite affect a material

💭 Think About

• Picture a block of material with your hands pushing or pulling on it in different directions. Which situation matches forces that are parallel but opposite? • Ask yourself: which type of stress tries to slide one layer of the material past another, and which type tries to stretch or squeeze it? • Identify which option is NOT a stress but rather the result of stress, and rule that one out first.

✅ Before You Answer

• Verify which terms in the choices are actual types of stress versus results of stress • Check which stress corresponds to forces acting parallel to the surface, not directly toward or away from each other • Confirm in your mind what compression and tension (tensile) look like physically, then compare that to the description in the question