TongsTongs are a type of tool used to and objects, often too hot to hold, instead of holding them with the hands. There are many forms of tongs adapted to their specific use. Design variations include resting points so that the working end of the tongs does not come into contact with a bench surface. Tongs are known to have been used by the Ancient Egyptians. The first tongs were probably basic wooden tongs, which were eventually followed by bronze bars from as early as 3000BC.
MetalType of materialIron, shown here as fragments and a 1 cm cube, is an example of a chemical element that is a metal.Metal in the form of a gravy boat made from stainless steel, an alloy largely composed of iron, chromium and nickelA metal (from Ancient Greek μέταλλον (métallon) 'mine, quarry, metal') is a material that, when polished or fractured, shows a lustrous appearance, and conducts electricity and heat relatively well.
Grip strengthGrip strength is the force applied by the hand to pull on or suspend from objects and is a specific part of hand strength. Optimum-sized objects permit the hand to wrap around a cylindrical shape with a diameter from 1 inch (2.5 cm) to 3 inches (7.6 cm). Stair rails are an example of where shape and diameter are critical for proper grip in case of a fall. Another grip strength that has been studied is the grip used when using a hammer or other hand tools.
Bronze AgeHistorical period (c. 3300–1200 BCE)Diffusion of metallurgy in Europe and Asia Minor—the darkest areas are the oldest.LocationAsiaNear EastEuropeNorth AfricaKey eventsExtensive bronze metallurgyLate Bronze Age collapseDevelopment of writingDevelopment of the chariotOne of the Alaca Höyük bronze standards from a pre-Hittite tomb dating to the 3rd millennium BC, from the Museum of Anatolian Civilizations in AnkaraThe Bronze Age is an archaeological and anthropological term defining a phase in the development of material culture among ancient societies in Asia, the Near East and Europe.
HandleA handle is a part of, or an attachment to, an object that allows it to be grasped and manipulated by hand. The design of each type of handle involves substantial ergonomic issues, even where these are dealt with intuitively or by following tradition. Handles for tools are an important part of their function, enabling the user to exploit the tools to maximum effect. Package handles allow for convenient carrying of packages.
LeverA lever is a simple machine consisting of a beam or rigid rod pivoted at a fixed hinge or fulcrum. A lever is a rigid body capable of rotating on a point on itself. On the basis of the locations of fulcrum, load, and effort, the lever is divided into three types. It is one of the six simple machines identified by Renaissance scientists.
BendingStrain caused by an external load Bending of an Ɪ-beam In applied mechanics, bending (also known as flexure) characterizes the behavior of a slender structural element subjected to an external load applied perpendicularly to a longitudinal axis of the element. The structural element is assumed to be such that at least one of its dimensions is a small fraction, typically 1/10 or less, of the other two.
Hand toolA hand tool is any tool that is powered by hand rather than a motor. Categories of hand tools include wrenches, pliers, cutters, files, striking tools, struck or hammered tools, screwdrivers, vises, clamps, snips, hacksaws, drills, and knives. Outdoor tools such as garden forks, pruning shears, and rakes are additional forms of hand tools. Portable power tools are not hand tools.Mechanical advantageMechanical advantage is a measure of the force amplification achieved by using a tool, mechanical device or machine system. The device trades off input forces against movement to obtain a desired amplification in the output force. The model for this is the law of the lever. Machine components designed to manage forces and movement in this way are called mechanisms. An ideal mechanism transmits power without adding to or subtracting from it.
ForceIn physics, a force is an action that can cause an object to change its velocity or its shape, or to resist other forces, or to cause changes of pressure in a fluid. In mechanics, force makes ideas like pushing or pulling mathematically precise. Because the magnitude and direction of a force are both important, force is a vector quantity (force vector).
FingerA finger is a prominent, multi-jointed digit on the forelimbs of tetrapod vertebrate animals with prehensile extremities (i.e. hands) such as humans and other primates, and is typically covered with a keratinized nail to protect the end (i.e. fingertip). Most tetrapods have five digits (pentadactyly), digits that are significantly shorter than the metacarpal/metatarsals, are typically referred to as toes; while digits that are notably elongated are called fingers.
Compression (physics)In mechanics, compression is the application of balanced inward ("pushing") forces to different points on a material or structure, that is, forces with no net sum or torque directed so as to reduce its size in one or more directions. It is contrasted with tension or traction, the application of balanced outward ("pulling") forces, and with shearing forces, directed so as to displace layers of the material parallel to each other.Special:Search/pliersRelated word or term.*As an Amazon Associate I earn from qualifying purchases.