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Archimedes' principle, physical law of buoyancy, discovered by the ancient Greek mathematician and inventor Archimedes, stating that any body completely or partially submerged in a fluid (gas or liquid) at rest is acted upon by an upward, or buoyant, force the magnitude of which is equal to the weight of the fluid

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that the buoyancy force on an object is equal to the weight of the fluid displaced by the object, or the density of the fluid multiplied by the submerged volume times the gravitational acceleration

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the pressure exerted by the weight of the atmosphere, which at sea level has a mean value of 101,325 pascals (roughly 14.6959 pounds per square inch).

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A Pascal is the SI unit of pressure

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the continuous physical force exerted on or against an object by something in contact with it.

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A  substance that has no fixed shape and yields easily to external pressure; a gas or (especially) a liquid.

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tendency to do nothing or to remain unchanged.

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Projectile motion is a form of motion in which an object or particle (in either case referred to as a projectile) is thrown near the Earth's surface, and it moves along a curved path under the action of gravity only.

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free fall is any motion of a body where gravity is the only force acting upon it

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the constant speed that a freely falling object eventually reaches when the resistance of the medium through which it is falling prevents further acceleration.

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a coherent, typically large body of matter with no definite shape.

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a body's relative mass or the quantity of matter contained by it, giving rise to a downward force; the heaviness of a person or thing.

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Gravity, or gravitation, is a natural phenomenon by which all things with mass are brought toward one another, including planets, stars and galaxies.

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the resistance that one surface or object encounters when moving over another.

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A net force is the sum of all forces acting on an object. A net force is capable of accelerating a mass

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The newton is the International System of Units derived unit of force. It is named after Isaac Newton in recognition of his work on classical mechanics, specifically Newton's second law of motion. See below for the conversion factors

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strength or energy as an attribute of physical action or movement.

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a vehicle's capacity to gain speed within a short time.

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the speed of something in a given direction.

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Average speed can be viewed as the rate of change in distance with respect to time

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the action or process of moving or being moved.

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a complex organic substance present in living cells, especially DNA or RNA, whose molecules consist of many nucleotides linked in a long chain.

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any of a class of nitrogenous organic compounds that consist of large molecules composed of one or more long chains of amino acids and are an essential part of all living organisms, especially as structural components of body tissues such as muscle, hair, collagen, etc., and as enzymes and antibodies.

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In biology, lipids comprise a group of naturally occurring molecules that include fats, waxes, sterols, fat-soluble vitamins, monoglycerides, diglycerides, triglycerides, phospholipids, and others.

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any of a large group of organic compounds occurring in foods and living tissues and including sugars, starch, and cellulose. They contain hydrogen and oxygen in the same ratio as water (2:1) and typically can be broken down to release energy in the animal body.

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An organic compound is any member of a large class of gaseous, liquid, or solid chemical compounds whose molecules contain carbon.