I don't quite understand air resistance. If the air flowing upwards during free fall with air resistance, for example, causes friction, then this air flowing upwards must also create lift through updraft. I always thought the formula for free fall with air resistance was: F (net) = F (weight) – F (static lift) – F…
If FA = FG (of a body in a liquid), we say that the body "floats," or does not sink any further. Does this mean that the body actually floats on the surface, or can the body also "float" at any depth in the liquid if the pressure or buoyancy force there is sufficiently large?…
Hi, we're currently studying this topic in physics. I know that the additional force required to pull something down or up is calculated using Fa – Fg or Fg – Fa. But when do you use which formula? Can someone explain this to me?
Hello, I have a question about the Mohr Westphal scale. If the heaviest rider hangs on the 9, the middle one on the 10 and the smallest one on the 1, what is the buoyancy force?
Hello everyone, I have a learning objective in science and technology: "I can name the force opposite to gravity and explain how it acts in water." Does anyone know the answer to the second part of the learning objective? Thanks for all answers
The buoyancy force is independent of the depth of the water in which the object is immersed, as long as the object is completely submerged. The pressure difference depends on the depth of the water. What exactly is the difference here, why do both provide buoyancy, but one depends on the depth and the other…
So, my question first requires a theoretical experimental setup: Let's assume we have a scale with a basin filled with water on it. Now, we take an object (body) that meets the requirements of floating in the water. That is, it doesn't sink and doesn't float to the surface, but rather hovers in one position….
Hello We need help with a physics group project We need to build some kind of submarine. It should be an object that sinks to the bottom of the water, stays there for 1-3 minutes and then rises again on its own. Chemical reactions are not allowed. How could this work?
Hello, I have this physics puzzle about buoyancy, but unfortunately I have absolutely no idea what I'm supposed to put together… Can anyone help me?
The drone has two counter-rotating rotors with a diameter of 1.2m and weighs 1.8kg. The Earth's atmosphere near the ground has a density of 1.2 kg m−3 and a gravitational force of approximately 9.81 m s−2. Here, the drone took off at 500 rotor revolutions per minute. The Martian atmosphere has a density of 0.020…
Hi, I recently read about the drone that flies on Mars. It was mentioned that it wasn't even certain whether it could fly there, because the air density isn't even 1% of that on Earth. It also said that Mars' gravity is only about 40% of Earth's. Now my question is how exactly that affects…
I realize that the volume of the water increases by the volume of the glass, but the previously floating glass also had an influence on the volume of the water, i.e. the water level, but I don't know exactly how to calculate this influence.