TeXercises.com

Förderschacht

About points...

We associate a certain number of points with each exercise.
When you click an exercise into a collection, this number will be taken as points for the exercise, kind of "by default".
But once the exercise is on the collection, you can edit the number of points for the exercise in the collection independently, without any effect on "points by default" as represented by the number here.

That being said... How many "default points" should you associate with an exercise upon creation?
As with difficulty, there is no straight forward and generally accepted way.
But as a guideline, we tend to give as many points by default as there are mathematical steps to do in the exercise.
Again, very vague... But the number should kind of represent the "work" required.

About difficulty...

We associate a certain difficulty with each exercise.
When you click an exercise into a collection, this number will be taken as difficulty for the exercise, kind of "by default".
But once the exercise is on the collection, you can edit its difficulty in the collection independently, without any effect on the "difficulty by default" here.
Why we use chess pieces? Well... we like chess, we like playing around with \(\LaTeX\)-fonts, we wanted symbols that need less space than six stars in a table-column... But in your layouts, you are of course free to indicate the difficulty of the exercise the way you want.

That being said... How "difficult" is an exercise? It depends on many factors, like what was being taught etc.
In physics exercises, we try to follow this pattern:

Level 1 - One formula (one you would find in a reference book) is enough to solve the exercise. Example exercise

Level 2 - Two formulas are needed, it's possible to compute an "in-between" solution, i.e. no algebraic equation needed. Example exercise

Level 3 - "Chain-computations" like on level 2, but 3+ calculations. Still, no equations, i.e. you are not forced to solve it in an algebraic manner. Example exercise

Level 4 - Exercise needs to be solved by algebraic equations, not possible to calculate numerical "in-between" results. Example exercise

Level 5 -
Level 6 -

Exercise

https://texercises.com/exercise/forderschacht/

Question

Solution

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Exercise:
In einem Förderschacht hängt an einem Stahlseil dessen Massebelegung .kilogrampermeter beträgt eine Last von kg. Ein Elektromotor hebt die Last um m an indem er das Seil auf einer Trommel aufhaspelt. abcliste abc DuSieBerechneBerechnen Sie formal Zahlenwerte nicht eingesetzt die vom Motor abgegebene momentane mechanische Leistung als Funktion der Zeit falls der Hebevorgang gleichförmig währ s erfolgt. Die Anfahr- und Abbremsphasen seien kurz und werden vernachlässigt; auch von der Reibung wird abgesehen. abc Stelle die unter a berechnete Leistungsfunktion in einem P-t-Diagramm massstäblich dar! abc Die beim Hebevorgang vom Elektromotor aufgenommene elektrische Energie beträgt .kWh. Mit welchem durchschnittlichen Wirkungsgrad hat der Motor bei diesem Prozess gearbeitet? abcliste

Solution:
abcliste abc Die momentane mechanische Leistung ist sscPmt left sscmL+sigma h-vtrightgfrachT gfrachT leftsscmL+sigma hright -sigma g leftfrachTright^ t . abc Aus a ist sofort ersichtlich dass die Funktion linear ist. Wir berechnen sie also am Anfangs- und Endzeitpunkt: sscPm .kW sscPmT .kW abc Der Wirkungsgrad ist eta fracsscWmsscWe fracfracleftsscPm+sscPmTrightsscWe . also etwa .%. abcliste

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Branches	Work, Energy, Power
Tags	arbeit, arbeitsintegral, diagramm, hubarbeit, leistung, masse, mechanik, physik, wirkungsgrad
Content image
Difficulty	(4, default)
Points	6 (default)
Language	(Deutsch)
Type	Calculative / Quantity
Creator	uz
Decoration
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