Jamesa

The Cruise of a lifetime.
The Disney Fantasy Cruis ship brings all the magic brought out in disney world onto the water for a family cruise of a lifetime.

Buoyancy

The Disney Fantasy Cruise ship holds a weight of 90 million pounds.That boat manages to float above water, even move across water. This could not be done without buoyancy. Bouoyancy is the apparent loss of weight of objects submerged in liquid. This is possible because the greater pressure against the bottom of the boat produces an upward buoyant force making it so it does the opposite of gravity. The upward force is called the buoyant force which is the consequence of pressure increasing with depth. The image below helps me explain the point, all the arrows represent forces that apply to the boat.Due to water pressure all the forces from that are exerted equally to the object, however the forces against the bottom of the boulder are greatest because it has the most depth, but they dont cancle eachother out. What they do is have an upward net force causing it to float.

Accleration

The Disney Fantasy Cruis ship can travel about 24-30 miles per hour. However when speaking about boats, they are measured in knots. One knot is equal to 1.51mph, knots are not often used. Knots are only really used for boats and weather (meterology). When a boat is floating above water which is due to boyance and friction, it travels at a pretty stardard rate between 24-30 mph (this many knots). To get from 24-30 it has to do with something called accleration. Accleration is the increasing rate and speed of something. When something increases it goes at 9.8 meters per second. Meaning that when you see the water crashing below a boat it is not only going at a speed but also increasing due to accleration. If this was not a cruis ship and more a jet ski, you could see the results of accleration a little better. On a jet ski since accleration is being added on to such a faster speed, the front of the boat begins to til forward causing the water to become thicker behind the boat. Friction

For a cruis ship to travel strongly through the water it requires alot of friction. It actually plays a part between the water and the boat. This is done when the layer of water near the boat partly moves along with the boat and rubs against it. The water puts a net drage force on the boat, making it so the boat stays along with the flow of water this also helps the anchor when the boat wants to stand still. The water will actually heat up a little and gain energy from the motion but gets lost in to water molecule. This is very different from the friction involving soilds. Between solids friction come into effect how things slide against eachother. In liquid, the faster something is the more friction there ism. Making them opposites from eachother.