The wind hitting the sail at an angle upwind pushes it sideways which is why you zigzag.
Downwind wind hit sail straight on
Sails use the wind to move a ship or boat. This has been true in the ancient past to the current day.
by using its sails and if theres no wind they use oars
no the wind blows the sail/s and makes the ship/boat move :)
Typically the wind and sails, but paddles and motors can be used. Tides and currents move them as well.The wind foils around the sail and actually pulls the boat forward. Should a given boat with high freeboard happen to have her sails down, the wind will still pull the boat downwind.
The wind blowing past the sails creates a force that pulls the boat along.
Actually, it does both depending on how you use them. The sails can move so a person sailing a boat can catch the wind by how they move the sail or they can also stop the boat by the movement of a sail or lowering the sail.
The wind power pushes the boat with the different sails that can be changed by the direction of the wind and with the help of the rudder or even shifting body weight. Normally a zig zag route maneuvers helps in pushing the boat forward.
By the types of sails that you have. or it could be the wind type or the wind's speed
By controlling its flow across the sails: If the boat is light enough, it WILL move faster across the water than the wind does.
Most of the time. Some are powered by motors, but all of them have the sails (different numbers for different kinds of ships). The wind catches in the sails and moves the boat. Depending on the angle of the sail, the ship can move in almost any direction. Though it is easiest when the wind is right behind the boat. When the wind is blowing in the opposite direction you want to go, then there is a technique that you can use called "tacking".
It is the same thing: You are in irons when you are making no headway.
The keel is important because it forces the boat to move forwards when the force of the wind on the sails might also be pushing the boat sideways. The keel stops the boat simply going directly downwind.