where is the centripetal acceleration. The direction of the force is toward the center of the circle in which the object is moving, or the osculating circle (the circle that best fits the local path of the object, if the path is not circular). The speed in the formula is squared, so twice the speed needs four times the force.
PVA (polyvinyl acetate). PVA's are the traditional wood glues, and some of the most common adhesives. They are also called aliphatic resins. They provide a strong wood-to-wood bond but will not adhere strongly or consistently to nonporous materials, such as metal or plastics.
All-Purpose Plastic Bonding. Silicone caulk forms a strong bond on virtually every plastic, but because it's very flexible and difficult to control, it isn't the best glue for rigid or small plastic repairs. Polyurethane glue is a good all-purpose choice; it's waterproof, flexible, permanent and adheres to most plastics. Cyanoacrylate glue, usually known as super glue, also bonds most plastics, but its lack of flexibility limits its usefulness to only the most rigid types. If you need a temporary bond, hot melt glue is a viable adhesive option.