We never think consciously about motion. How many times have we said something like: "I’m not strong enough to lift it!" or partied so hard we didn’t have enough energy to study for a test? Mechanics Part 1 will help us understand all this from a physical point of view. We will see what can cause, for example, a disc prolapse and to which mechanical loads our bodies are subjected. Here you can proceed to Mechanics Part 2.
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Bild: “Old Cogs” von Emmanuel Huybrechts. Lizenz: CC BY 2.0


Pressure can be measured with an instrument called manometer. The pressure is the result of a force, exerted upon the surface of an object:

p = FN / A

p ⇒ pressure [Pa], [N/m2]
A ⇒ area of the surface [m2]
V ⇒ volume [m3], [l]

Boyle-Mariotte Law

The Boyle-Mariotte law describes ideal gases; it states that the pressure of a gas is inversely proportional to its volume. For instance, if you release half of the volume of a gas from an air-compressed tank, the pressure in the tank will be only half as large. It can be described in the following formula:

p ∼ 1 / V

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