Physics of Sailing :: physics sail boat sailing boating

A ride floating can be greatly appreciated, especially if you are in the boat at the time. except what keeps a boat from sinking? Physics can explain these concepts. There are many forces that act on a sailing ship to draw up it in motion, but the buoyant force is what is required to keep the boat from sinking. A buoyant force is the normal force that pushes up on the boat supporting its weight in a fluid. The buoyant force equals the weight of the fluid displaced by the object.(pg.427, Serway and Jewett) This concept is Archimedes Principle.The pressure on an object in a fluid varies with the depth of that part of the object in the fluid.B=(P b P t)A = ( fluidgh)A = fluidgVB=Buoyant forceP b=pressure at bottomP t=pressure at topA=area of bottom face fluid=fluid densityg= gravitational attractionh= heightV=volume of fluid displaced by object(formula from pg. 428, Serway and Jewett)The fraction of the volume of a floating object that is infra the fluid advance is equal to the ratio of the density of the object to that of the fluid.(p.429, Serway and Jewett)V fluid/Vobj = obj/ fluidVobj=volume of the object obj=density of the objectBuoyancy of the craft is created by the physical body of the hull, but also with buoyant materials in specific places. Air tanks, buoyancy bags, and polystyrene blocks are all used to add buoyancy to a boat.The figure below shows how the buoyant material should be distributed and the effects if it is not.figure from The Handbook of SailingThe distrubution of buoyancy is key to having the boat float properly.Bernoullis principle is that the air moving previous(prenominal) a foil, an object that has one curved side and one categoric side, will take longer to move past the curved side than the flat side of the foil. This will baffle the flat side to have higher air pressure and to exert a force on the object. The force cause a planes wing to lift and a sail to push a boat. With the wind pushing on one side of the sails and th e water pushing on the other side of the centerboard, the boat moves forward. (p. 35, Dellenbaugh)The angle at which sailing is important. A 45 degree angle to the wind is the most effective angle. Wind is what propels a sailing ship so weather has a large impact on the craft. Certain weather conditions are not suitable for sailing or specific crafts.