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…
I wanted to demonstrate in my wind tunnel with Ruach that it's laminar. But I noticed that smoke is more visible above the wing than below. Could someone explain this to me? The speed is actually higher above, which should make the smoke less visible, right?
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?…
Hey people, I have problems in the book that I don't understand at all. Could someone give me complete answers (including the calculations)? I've already asked the question, but I don't think the guy explained it very well. I have a presentation on it in three days. (Questions 4, 3, 6) Thanks in advance Greetings…
Hello dear community, I wanted to brush up on my physics before starting my studies, but I came up with the result of 110 kg, or 10 kg of sand. But the result should be 13.6 kg. Can someone explain this in detail?
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'm writing a physics paper tomorrow about forces, and I just don't understand how to calculate buoyancy. Especially how to calculate the density of a liquid, so I would really appreciate it if someone could explain it to me in simple terms so I can understand it.
Hi, could someone please solve the 2, 3, 4, and 6 questions? That would help me prepare better. Thanks!