How much less does a body weigh in water vs land?

Answer 1

A body weighs the same in water as on land. because water is more dense than air, the body APPEARS to be lighter, but it is not

AnswerTo determine the weight of any obect in water that is not floating subtract the weight of an equal volume of water (the amount of water displaced by the object) from the weight of the object when outside of the water.

Answer 2

Because the water is more dense than the air making you lighter in the water than in air.

More Information:

You don't really weigh less, but the water pushes you up (buoyant force).

Buoyant Force, Buoyant Force of water, Archimedes' Principle:

Surface tension of a liquid affects the buoyant force of that liquid. Archimedes did not consider this.

As a practical matter, surface tension is not always considered. So, when an object (like a boat) is placed in a liquid (like a lake); the buoyant force is equal to the weight of the water that is displaced by the boat, and acts in net opposition to the force of gravity, holding the boat up (floating it).

Your weight is the same, in or out of water, but the water will buoy (support all, or most, of your weight), nullifying, or nearly nullifying, the effect of your weight on the weighing device. If you float in water, your buoyancy is positive. If you sink in water, your buoyancy is negative, in either case, however, you would appear to weigh less than your true weight.

There is some controversy concerning the buoyant force of solids, but buoyancy is a property of all matter, although quantifying this force is more difficult if the buoyant force of a solid, or a gas, is being considered. It is not possible to press a finger into a piece of steel due to the strength of the buoyant force of the steel acting against the finger. Hardness can be considered a measure of the buoyant force of dense objects, although it is seldom viewed, or used in this way.

Without this physical property of matter, airplanes could not fly, trains would sink into their tracks, cars would sink into roads and through bridges; surfboards, boats, and ships would not float, and we would sink, not swim.

Answer 3

A body weighs about 10% less in water compared to on land due to the buoyant force acting on it. This is because when submerged in water, the body displaces water equal to its own weight, which partially counteracts the force of gravity pulling it down.