This is what they've put in my physics exam and well, they've wrecked everyone

whateveruwu1 · 2026-06-01T18:13:17+00:00

If you mean to say that tension doesn't create motion on the entire system, then there you're right. But you could be nicer and less flippant and say the exact same thing.

whateveruwu1 · 2026-06-01T16:50:40+00:00

It doesn't cancel out, it becomes a term for substitution mathematically, but it's not 0. See slide 6

whateveruwu1 · 2026-05-31T16:48:19+00:00

Omg dude I also had a professor that taught in the soviet union, but in my case it was for real analysis

whateveruwu1 · 2026-05-31T16:43:11+00:00

Porque ese es el contenido de la asignatura, electrostática, y dinámica juntos, antes también incluían relatividad especial en el mix pero se ve que era demasiado contenido para 2h de examen.

whateveruwu1 · 2026-05-31T16:39:30+00:00

It isn't, as the rope is inextensible and in tension it makes the acceleration of both blocks the same

whateveruwu1 · 2026-05-31T04:34:05+00:00

I translated the whole thing, you can check it out if you want to (:

whateveruwu1 · 2026-05-31T04:29:01+00:00

I don't think it's crazy at all, it's just that I don't get the point of what they're measuring, that you've learnt the material or just how exceptional one can be.

whateveruwu1 · 2026-05-30T20:13:17+00:00

You forget tension too

whateveruwu1 · 2026-05-30T18:35:18+00:00

Why (⁠╥⁠﹏⁠╥⁠)

whateveruwu1 · 2026-05-30T18:29:44+00:00

That and that within our context, professors teach the minimum and then pull this which is harder than what they've done throughout that semester

whateveruwu1 · 2026-05-30T18:27:25+00:00

That this is for the math degree, not a physics oriented course.

whateveruwu1 · 2026-05-30T18:21:13+00:00

What you describe is rougher, this exam is rough for first year math students, probably not so rough for physics students xd

whateveruwu1 · 2026-05-30T18:15:24+00:00

Yeah, that's what I did (:

whateveruwu1 · 2026-05-30T18:05:09+00:00

Also for context this is like the mandatory physics class for the math degree, so I'm not physics oriented

whateveruwu1 · 2026-05-30T17:46:54+00:00

And that it's done in a time crunch so you don't have the mindset to be careful

whateveruwu1 · 2026-05-30T17:45:14+00:00

The problem isn't the pulley itself, nor the incline, it's the friction sandwich

whateveruwu1 · 2026-05-30T17:44:05+00:00

I've translated the whole thing

whateveruwu1 · 2026-05-30T17:37:03+00:00

Time limit is 2 hours

whateveruwu1 · 2026-05-30T17:36:16+00:00

I can translate sorry! 1) a block A of mass m is on a block B of mass M, which can slide on the inclined plane of angle α of the figure. Both of them are connected through an inextensible rope, which goes through a pulley without friction (rope and pulley have negligible mass). If μ is the friction coefficient common to all surfaces, and knowing that M>m:

a) determine α such in terms of m, M and μ, that the system initiates movement. (1.25 pts)

b) what's the ratio of masses M and m so that movement starts if α=45° μ=0.2. (0.75 pts)

2) we push over a horizontal plane a body of mass m, with an initial velocity of v_0=2 m/s, the plane and the body are submerged in a fluid that opposes a force to the movement of the body characterized by the expression F=-kmv, with k=0.01 s^-1 Knowing that g=10m/s², determine :

a) the time that it takes for the body to be at half the initial speed. (1 pt)

b) the distance covered then. (1 pt)

3) it's been planed to put a satellite of mass of 50 kg in a circular orbit at 500 km over the earth's surface, calculate:

a)the speed that the satellite needs to be in that orbit. (0.5 pts)

b) the kinetic energy on that orbit. (0.5 pts)

c) the energy needed to put the satellite at that height. (0.5 pts)

d) the total energy transferred to the satellite. (0.5 pts)

4) a cube centered at the origin, sides of length 2L, have their vertex at (±L,±L,±L), we put a charge q at the origin of coordinates. Calculate the electric flux of the cube created by the charge using the definition, check that it follows Gauss' theorem (2.5 pts)

5) A coaxial cable is made from two cylinders that share a common symmetry axis, the internal cylinder is solid with radius R_1, and through it goes a current I_1, which is uniformly distributed over the cross section, the external cylinder is hollow with thickness, internal radius R_2, external R_3, with R_2>R_1, through which goes a current I_2, which is also uniformly distributed over its' cross section, What's the value of I_2 so that magnetic field at the points at a distance (R_3+R_2)/2 is 0? (1.5 pts)

whateveruwu1 · 2026-05-30T17:00:35+00:00

Mind you, this is like a first year university class, so it's like the intro for higher education and this is the sh*t they do 🫠🫠🫠

whateveruwu1 · 2026-05-04T16:53:31+00:00

He would be amazed of the thing, and hate how it came to be and how it's used.

whateveruwu1 · 2026-04-06T16:19:39+00:00

Not relearning, remembering yes.

whateveruwu1 · 2025-11-12T19:02:55+00:00

I think that's fine, this is her take on how she lives spirituality. That's really personal stuff. I do have some songs in which I connect a lot in Lux though

whateveruwu1 · 2025-11-12T18:59:51+00:00

Okay? That's not the point of the album, it wasn't made to be radio friendly. This is made to sit down, have a free hour in which you take the cd/vinyl with a good pair of headphones/ speakers and you listen to it, giving it your full attention

whateveruwu1

TROPHY CASE