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Physik Kräfte?

ByJulFrida

Hey, wir schreiben am Freitag unerwartet einen kleinen Test in Physik…Leider check ich das Thema gar nicht.Kann mit z.b. diese angehängte Aufgabe erklären?Ich verstehe gar nicht wie man das rechnet…Ich hab es schon im Untwrricjt nd verstanden aber ich dachte, egal wir schreiben ja nicht mehr und jetzt das.Es kommt der Trägheitssatz dran, welchen ich…

Wie integriert man n?

ByKasi2003

Ich habe ein paar Aufgaben gemacht und habe ich alles falsch gemacht. Das war die Aufgabe: Das war meine fehlerhafte Lösung Das ist die richtige Lösung: Ich bin wirklich extrem schlecht in Mathe, deswegen brauche ich eine wirklich einfache, simple und detaillierte Erklärung was ich alles falsch gemacht habe. ich habe halt nur eine extrem…

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Morfi655
Morfi655
11 months ago

For this, one should know the coefficient of friction. Since both asphalt and rope are rough, it can even be above 1 (if the rope hangs on the asphalt).

There is also a difference between adhesion and sliding friction. If the rope is in motion, the force may be smaller (but do not have to).

If we assume that the coefficient of friction (μ) is exactly 1 then F_Reibung = F_Normal*μ = F_Normal

And the normal force is mass times g. So this would be 5 N.

The length does not matter, the weight alone decides. At least as long as effects of intertwining fibers or the like can be imagined on the outside.

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ahtnamas22
Author
ahtnamas22
11 months ago
Reply to  Morfi655

Oh, thanks for the great answer and your work. Very interesting to know 🥰

0
diderot2019
diderot2019
11 months ago

According to theory, the length of the rope plays no role. But for this the friction constant.

1
manian
manian
11 months ago

It is not possible without coefficients of friction of the rope. Either to find in the task or in the TBB. Otherwise, calculate with Fn=m*g and with Fr=Fn*μ, where μ indicates the coefficient of friction.

0
ahtnamas22
Author
ahtnamas22
11 months ago
Reply to  manian

There is no task, only interest. I could not have had physics and I would have been interested

0
manian
manian
11 months ago
Reply to  ahtnamas22

The coefficient of friction is determined by a calibration office. Many coefficients of friction are found in the tablebook. A rope is difficult because there are many information missing. Zb the thickness/laying surface, the material, wear etc. If you take a piece of metal, zb iron is much easier.

HERE https://www.schweizer-fn.de/stoff/ friction values/friction values.php you can find different coefficients

1
dompfeifer
dompfeifer
11 months ago

We need to calculate

  • the coefficient of friction between rope and asphalt
  • the transport speed
0
Funship
Funship
11 months ago
Reply to  dompfeifer

How does speed play a role?

0