5. Mechanic properties of bodies, liquids and gases

1. 5. Mechanic properties of bodies, liquids and gases Kamil Sarka

2. Point mass Rigid body

3. Jack equilibrium r2 r1 http://www.walter-fendt.de/ph14cz/lever_cz.htm

4. Deformation of bodies (solids) force „pressure“ surface Young modul

5. Hooke‘s law „Ut tensio, sic vis.“ – Robert Hooke, 1676 Elasticity limit Proportionality limit Rupture (Tenacity limit) Yield point Hooke‘s law region Necking region Strain hardening region

6. Liquids and gases Non-deformable   10-9 Pa-1 deformable Smaler distances between individual particles Bigger distances between individual particles

7. Pressure http://www.unit-conversion.info/pressure.html

9. Pascal‘s law …states that if you apply pressure to fluids that are confined (or can't flow to anywhere), the fluids will then transmit (or send out) that same pressure in all directions at the same rate. F s 200 kPa 200 kPa 200 kPa

10. F1 a1 F2 a1 s1 s2 p1 p2 Hydraulic principle Hydraulic jack

11. Hydrostatic pressure (in liquids hydrostatic pressure, in gases barometric pressure) http://www.ac.wwu.edu/~vawter/PhysicsNet/Topics/Pressure/HydroStatic.html

12. Pressure measurement Principle of mercury barometer http://hyperphysics.phy-astr.gsu.edu/Hbase/pman.html

13. Archimedes‘ law (Buoyancy) Hmm! The crown seems lighter under water! http://hyperphysics.phy-astr.gsu.edu/Hbase/pbuoy2.html#arc http://en.wikipedia.org/wiki/Buoyancy http://home.flash.net/~table/gasses/archem.htm

14. Surface tension The surface tension is the magnitude of the force F excerted parallel to the surface of a liquid divided by the length L of the line over which the force acts.

15. http://www3.interscience.wiley.com:8100/legacy/college/cutnell/0471151831/ste/ste.pdfhttp://www3.interscience.wiley.com:8100/legacy/college/cutnell/0471151831/ste/ste.pdf http://hyperphysics.phy-astr.gsu.edu/Hbase/surten.html

16. Wettability and capillarity

17. Thank you.