[Freshman university mechanics - pseudo forces]

[Freshman university mechanics - pseudo forces]

https://preview.redd.it/hqdrfsixuzhh1.png?width=1031&format=png&auto=webp&s=2c0567ecd503e016b86a661f331052cb5a9970f9

https://preview.redd.it/n42g9jeeyzhh1.png?width=1317&format=png&auto=webp&s=e0b99e4c157d1e9b2d9fd995ddec6dc91ca4d074

https://preview.redd.it/kvrkkp9q00ih1.png?width=1046&format=png&auto=webp&s=192dc5c95393c5bd8bc0bd0ab42636fb1dc87d28

Question: We have a trolly accelerating a meters per second square. The trolly is filled with a viscous liquid resisting motion by a factor of b (that is to say, exerting a force bv opposite to v, where v is the object's velocity with respect to the liquid). In the trolly, there is a slope with angle alpha radians to the floor of the cart, on which there is an object of mass m connected to a spring with a constant k. Gravity is obviously acting - mg towards the floor of the trolly we have to calculate the normal force exerted by the slope. See the first picture.
Here is my attempt: See second image
Red is viscosity, purple is the spring, green is d'alembert force, blue is gravity, and N is normal.
I flip the diagram by alpha radians to get the third image, and from here it's just decomposing the forces and a quick calculation. I was quite sure in myself but each of my friends I show it to has a different opinion on the pseudoforces and the decomposition. I got (mg-ma)sin(alpha), but nobody else got that result, can someone please confirm or explain to me where I am wrong? Because my friends aren't very coherent

u/Silly_Tension6792 — 13 days ago
▲ 646 r/truths

Benjamin Netanyahu is not the president of Israel as for today

That is because he is the prime minister. The president is Itzhak (Isaac) "Bougie" Herzog.

u/Silly_Tension6792 — 2 months ago
▲ 101 r/civ

Why can't I build a hydro plant?

I have electronics, I am near the ocean, why can't I build a hydro plant?

Civilization wiki says you need access to ocean or river:

Effect

  • Production increased by 50%.
  • The city must be near a river or a ocean square.
  • Reduces industrial pollution by 1/2.

Update: I won. Still no idea why I wasn't able to build it.

u/Silly_Tension6792 — 3 months ago

De-Moivre était-il bleu?

Je sais pas pourquoi, je peux pas ajouter une image ici, mais si vous cherchez Abraham De-Moivre (le mathématicien) puis entrez dans son article Wikipedia, vous verrez son portrait le plus fameux, et dans ce portrait- son visage est gris-bleu? Pourquoi? Avait-il quelque maladie?

reddit.com
u/Silly_Tension6792 — 3 months ago