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.
â  Melamine resin is the fancy name for things like Formica. Itâs a plastic, but it canât be remelted into usable shapes. Gluing may be difficult with common adhesives. * PVAc is not the same as PVC. PVAc stands for polyvinyl acetate, a kind of plastic used in common household glues, among other things.