11kph measured in Speed Over Ground (SOG)
Wind motion is the type of energy used by kites and sailboats.
some sail boats have moters onley big sail boats have moters not small ones
boats is the answer to your question
There are sail boats, ugly boats, pretty boats, speed boats, fun boats, unfun boats, amazingness boats! i luv boats! i own a boat!!there are sail boats row boats speed boats paddle boats
By using a sail and at last resort a mortar
There are sail planes, sail boats, sail cars, and with a spaceship you could sail to the stars.
The Vikings' boats had one sail because they also had oars with which to row.
Bays
Water
The average sail boats travel at the rate at which the wind can pull them. There is no set rate.
Caravels
Fairly