Statics is the action of one body on another. A force is either a push or a pull. A force tends to move a body in the direction of its action. The action of a force is characterized by its magnitude, by the direction of its action, and by its point of application. Thus, force is a vector quantity, because its effect depends on the direction as well as on the magnitude of the action. Forces are classified as either contact or body forces. A contact force is produced by direct physical contact; an example is the force exerted on a
Silver as an investment silver can be instantly bought or sold just like any foreign currency. Unlike holding physical silver, the customer has a claim against the bank for a certain quantity of metal. Digital gold currency providers and internet bullion exchanges, such as BullionVault or GoldMoney, offer silver as an alternative to gold. Some of these companies allow investors to redeem their investment through delivery of physical silver. Derivatives, such as silver futures and options, currently trade on various exchanges around the world. In the U.S., silver futures are primarily traded on COMEX (Commodity Exchange), which is a subsidiary of the New York