0
The total weight of the surface area of a boat is less than than the weight of a body of water of the same size (buoyancy), so that is why it floats. A needle sinks because a body of water with the same size is lighter than the needle.
Note: It is entirely possible to float a needle on water. It requires a bit of doing, but it can be done.
Wiki User
∙ 12y ago
Add your answer:
Earn +20 pts
Does the needle float or sink in water?
A needle sink in water.
How can a boat float and don't sink?
because the boat is made out of stuff that can float
What will sink float or suspend?
A boat
How does the shape of the boat effect it to sink or float?
The science is called "displacement". If the shape of the boat allows the amount of the boat in the water to be less weight than the water it displaces it will float. If the amount of the boat in the water weighs more than the water it displaces it will sink.
Why a needle does not float whereas a heavy ship floats-?
A needle doesn't float because there is very little air in a needle. Metal is much more dense than wood, which is what most boats are made of. When a boat is made of metal, there are air stores inside of the boat that keep it afloat.
Do material and shape affect buoyancy of a toy boat?
Yes it does because depending on the materials of the boat and how much their mass is can change the buoyancy of the toy boat. Boat can be designed to have less volume in order for it to have less density and be able to float. So if the material's mass is alot if can make the boat sink. If the material's mass is not alot then it can help the boat float. If the shape is designed to have more volume than mass it will float. If not then it will sink.
Do plastic boats sink or float?
All plastic items float on water, so therefore a plastic boat floats on water.
What are some examples of rough er analogy's?
that a car should float and that a boat should sink
Do boats sink?
Boats can sink. They are usually made of materials that allow them to displace water, and permit them to float. From time to time, that material will break down, and the boat will sink.
Why is it that a needle may float on a clean water but sink when detergent is added to the water?
Because the detergent reduces the surface tension of the water.
How does a boat float without sinking?
The weight of the boat displaces the same weight of water, and while there is still sides of the boat above the surface, the boat will float. If such an open boat is swamped, the gunnels may sink to sea level, and may even sink beneath. Usually, water-tight compartments, light, floating material, and any wood in the boat's construction, will help prevent the boat sinking entirely, if at all.
Why does a small rock sink and a boat float?
Bouyancy. A Boat/ship is hollowed out to be use to passengers, were as rocks are solid and have a lot less buoyancy.
