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.
Plaster lamp repair w/ missing parts. Miniature Porcelain. PVA is a better choice for mending archeological ceramic, bones or wood mainly because the repaired surface is required to be untreated or untouched. The bonding principal of PVA is that it soaks into porous materials such as old ceramic, bones, wood, etc. For best adherence strength and longevity, use the proper PVA viscosity (V15 or V25 for porous ceramic). Resin epoxies are a better choice for mending all nonporous materials and porous materials that require complete restoration (fillers and coloring). See more details on material used.