Recent content by JackFyre

I was just curious about the formation of the starting vortex in symmetric airfoils, and how it may explain why symmetric foils show 0 lift at 0 AoA. Thanks!

Greetings! An aerofoil experiences life because the velocity of flow at the top surface of the airfoil is higher, causing a pressure difference. This higher velocity is attained as a consequence of the conservation of angular momentum due to the formation of a starting vortex at the trailing...

Thanks, that clears it up!

A question regarding the minimum velocity required by a particle to 'do a loop' without falling- Assuming the particle has a velocity v before reaching the loop. Then- KE = mv²/2, at the bottom of the loop. potential energy at the top-most point of the loop= 2mgr (2r = h) then, by the law of...

That pretty much answers it, thanks!

I have a doubt regarding the basic function of vectors and scalars in physics- What is the guarantee that every quantity(measured) in physics can be classified as either a vector or a scalar, and that while performing operations on said quantities, they will obey the already established rules...

I was just reading up about the Earth's three motions, and it was written that the 'wobbling motion' (precession) exhibited by the Earth, could be compared to that of a spinning top. Intuitively, I guessed that a spinning top wobbles because of the Earth's gravity, and I found out that the...

Just a little doubt regarding vector dot products- From what I understand(which may be wrong), dot products are the products of the magnitudes of the two vectors. The equation is given as a · b= |a|x|b|cos θ Can this be understood as the magnitude of a x the magnitude of b in the direction of...

"Judging by the thickness of the red line, that graph is only accurate to about +/- 5 cm and +/- 50 ms anyway. " I think the thickness of the line is unavoidable, because we can safely assume that it represents an imaginary line of no thickness. My problem with the graph is not that its...

I get it. Thanks folks. Based on your responses, can I conclude that these kinds of graphs cannot represent any physical body in reality, that is they are wrong; but can be considered accurate for all practical purposes.

Is the below Displacement time graph posible? if an object is in motion at a constant velocity, is it possible for it to stop instantaneously, or does there have to be a decelaration? According to Newton's first, an object will remain in its state of constant velocity unless acted upon by...

Thanks. Makes it clear.

Hey Folks! I've got a longish one- At what angle must you release a projectile to achieve a semicircular trajectory(neglecting air-resistance)? Would the initial release velocity matter? and would the same criteria hold true if the value of g were different(on the moon for example)? and is there...

Yeah, I get that exclusion explains it, but the reason I am asking is to redeem a couple marks in a test😅

Hey guys! Not a brain scratcher as such, just a clarification. When we talk about Bohr's postulates for his atomic model, would the Bohr-Bury scheme be involved in it? like in his postulates?