Shear force is the external force applied parallel to the surface of a material, causing it to deform or slide. Shear stress, on the other hand, is the internal resistance within a material to the shear force applied, resulting in deformation. In simpler terms, shear force is the external force applied, while shear stress is the internal resistance within the material to that force. **

A modeling shear is used to create texture and remove weight from the hair, while a thinning shear is used to remove bulk and reduce the thickness of the hair. Modeling shears have wider teeth and are used to create soft, blended layers, while thinning shears have finer teeth and are used to create a more diffused, feathered look. Additionally, thinning shears are often used on specific sections of the hair to create a more natural, seamless result, while modeling shears are used more generally throughout the hair. **

To shear a sheep, you will need sharp shearing scissors or electric clippers. Begin by securing the sheep in a comfortable position, either standing or lying down. Start by removing the fleece from the belly and then work your way up the sides of the sheep. Be careful not to cut the sheep's skin while shearing. Once you have removed all the fleece, make sure to properly clean and care for the sheep to ensure its well-being. **

To shear rabbits, you will need a pair of sharp scissors or shears specifically designed for grooming rabbits. Begin by gently holding the rabbit in a secure position, making sure not to cause any stress or discomfort. Carefully trim the fur starting from the back and working your way towards the head, being cautious not to cut the rabbit's skin. It is important to work slowly and carefully to ensure a safe and comfortable grooming experience for the rabbit. **

Shear forces in mechanics are forces that act parallel to a surface, causing different parts of the surface to slide past each other in opposite directions. These forces are responsible for causing deformation or failure in materials by causing them to bend, twist, or break. Shear forces are important to consider in engineering and construction to ensure the structural integrity of buildings and other structures. **

To clean a pruning shear, start by wiping off any dirt or debris with a clean cloth. Next, use a mixture of warm water and mild soap to scrub the blades and handles. Make sure to dry the shears thoroughly to prevent rusting. Finally, apply a light coat of oil to the blades to keep them lubricated and prevent them from sticking. **

To clean garden shears, start by wiping off any dirt or debris with a clean cloth. Next, use a mixture of warm water and mild detergent to scrub the blades thoroughly. Rinse the shears with clean water and dry them completely with a towel. Finally, apply a light coat of oil to the blades to prevent rusting. **

Examples of shear stress include the force applied to a book when sliding it across a table, the stress experienced by a beam when a load is applied perpendicular to its length, and the stress on a metal sheet when it is being cut with a shear tool. In each of these cases, the material experiences a force that causes its internal layers to slide past each other, resulting in shear stress. **