at what speed do objects fall in water?

Answer 1

Change the question to "fall in air" and think about it. A parachute drops slower than a rock. The shape influence the speed due to drag.

Same for water.

Answer 2

Water presents some intereting characteristics to falling objects. Speed of fall will be influenced by the specific density of the object AND the shape of the object...an object that presents a foil surface, such as a disc, will glide as if flying, and round object will sink quickly. To prove this, drop a dime, laying flat with water surface into a deep water-filled container, see how long it takes to reach the bottom...then take a quarter (heavier) and do the same thing...the quarter will take longer, for its foil surface is larger, presenting more 'sail' area.

Answer 3

every time an object is falling in a non vacuum media there are two forces: the object's weight determined by gravity and resistance force that depends on: mass of falling object, density of the fluid and cross sectional area of the falling object. Terminal
velocity is given by: vt = sqrt(2mg/ρAC).

Vt is the terminal velocity,
m is the mass of the falling object,
g is gravitational acceleration,
C is the drag coefficient,
ρ is the density of the fluid the object is falling through, and
A is the object's cross-sectional area

Answer 4

On land things fall at a rate of 9.8 meters per second squared,
yet I am trying to experimentally find a similar value for things falling
in water. Is this possible to do?
------------------------------------------------
You may, but I don't think so. Gravity applies the same force to us in
water as in air; the difference in the perceived force is because gravity
is also pulling on the water as well. For, say, a block of metal to fall
in water, an equal volume of water must rise. Thus, the total force on the
metal will be equal to the weight of the metal block minus the weight of an
equal volume of water. So, the weight of an object in water will not be a
function of only the mass of the object, but also of its volume. The 9.8
m/s^2 gravitational acceleration for objects in a vacuum also translates to
a weight of 9.8 N/kg. The weight is a function of the mass, and of the
mass alone. Under water, you need to consider the force from the bouyancy
of the water, which does not depend on the mass of the object, but on its
volume.


check this source for more detail
http://www.newton.dep.anl.gov/askasci/phy99/phy99x88.htm

Answer 5

There is no constant speed something sinks in water.

It depends on a number of things including the buouancy of the object as well as the pressure of the water around the object as it sinks...Of course, the weight of the object sinking.

Answer 6

You have to take into acount that although gravity is uniform allthroughout, it is drag that creates differences in the speeds of falling objects. Water has a very large drag coefficient. Find out how much drag there is first. Note: it varies from object to object based on their shape.

Answer 7

when objects fall in water they experience upthrust in the opposite direction of the gravitional force.this tends to slow down the speed of the object in water.depending upon the mass and density of the object the speed of the object in water can be found out which is less than 9.8m/sec.

Answer 8

Depends on its buoyancy. The denser the object, the faster it will sink.

Answer 9

erm depends...what speed u throw at it or from what height...