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Why does the wind go in the sail of a boat?
Actually, it foils around it, giving 'pull' on the downwind side of the sail.
Is it better to sail with squared sails when the wind is opposite you?
You cannot sail with the wind opposite you. If the wind is following you, that is, directly astern, then you sail 'gull winged'.
How does a boat sail against the wind?
To sail against the wind, a boat has to 'tack'. This means that instead of sailing straight into the wind (which would get you nowhere) you sail in a zig-zag in the direction you intend to go. On each tack, the wind is on a different side of the sail.
Did the invention of triangular lateen sails make it possible for ships to sail more easily into the wind?
Allegedly, the lateen sail design made it possible to sail closer into the wind. That is, less than 45 degrees from the direction the wind is blowing. No sail boat can sail directly into the wind. Yet.
Did the lateen sail decrease a sailer's dependence on the force of the wind or on the direction of the wind?
The lateen sail increased a sailor's ability to sail effectively into the wind, rather than decreasing dependence on the wind's force. By allowing for better maneuverability and efficiency in changing wind conditions, the lateen sail revolutionized sailing techniques and made it easier to sail against the wind.
What is a three sided sail?
A three sided sail is known as a Lateen sail or also a triangular sail. With a four sided sail one is only able to sail against the wind, but with a Lateen sail it is possible to sail more directly into the wind.
Device that helps ships sail into the wind?
No sailing ship can sail directly into the wind. However by rigging the sails correctly the vessel can be made to sail more closely to the wind.
What invention allowed ships to sail into the wind?
Wut made ships sail in the wind was that using a persicet sail or flag will pick up the wind and will push the air out and sail..just like u swinging on a swing 
How many miles per hour does an average sailboat travel?
The average sail boats travel at the rate at which the wind can pull them. There is no set rate.
How does a boat sail into the wind?
A boat can sail into the wind by sailing backwards and forwards (tacking) at an angle to the wind and so making her way up.
How Does a Boat Sail Upwind?
A sailing boat can not sail directly upwind, sail at about 45 degrees to the wind and tack (turn the boat through the wind) to the other side of the wind and continue in this zig-zag manner up wind.
How do sails and the wind move a boat?
The wind hitting the sail at an angle upwind pushes it sideways which is why you zigzag. Downwind wind hit sail straight on
