I am very thin, height 170, weight 96. grade students, when swimming without sinking, pull me down my classmates like swimming ring him up to two people, I can press down, I can swim, relax and sink as one in Dead Sea do not go, they I said absolutely not drowning, but I just wanted to sink!I have put the belly of the air out, but is without sinking, and dead floating on the surface
buoyancy1. buoyancy and causes: objects immersed in liquids (or gases) are subjected to liquids (or gases), and their buoyancy is called buoyancy.Direction: vertical upward;Reason: the pressure difference between a liquid and an object.2. Archimedes principle: the object immersed in a liquid is upward buoyancy, the size of the buoyancy is equal to the gravity of the liquid.F = G = P floating liquid discharge liquid gV.
Relax when swimming in the water, wearing goggles, feel the buoyancy, before I can't dive, the feeling is always floating in the water, then slowly feel down and try to dive in the pool, finally can sink to the bottom of the pool cleaning. It doesn't matter what you say, the key is that you try to learn to sink into the water. The breaststroke doesn't need to be submerged, and the butterfly stroke doesn't need it. It's for diving and reversing.
Formula 3.: F = G-T = float buoyancy P = F, liquid gV under pressureWhen 4. objects float: F = G and P floating matter P < liquid when the object suspended: F = G and substance P floating liquid = PWhen the object surface: F >G and P < floating substance P solution when the object sinks: F <G and P > floating substance P solutionBuoyancy F float(N) F, floating =G matter - G, depending on the G: the gravity of the object in the liquid
