A boat is often ran by an engine and propellers that are located under the boat or in the rear. Some engines require a key to start and others you have round up like a lawn mower for it to operate.
A boat floats because of buoyancy (upthrust force) or buoyant force as is the scientific name for downwards pull or gravity on the water being displaced by the boat, helping the boat to stay afloat, despite the possible huge size of boats.
Another thing that makes a boat float is that its density is lower than the water´s density. This is because some parts of boats are very big but they are empty.
A boat floats because of buoyancy (upthrust force) or buoyant force as is the scientific name for downwards pull or gravity on the water being displaced by the boat, helping the boat to stay afloat, despite the possible huge size of boats.
Another thing that makes a boat float is that its density is lower than the water´s density. This is because some parts of boats are very big but they are empty.