Masse am Schrägseil
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.
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 -
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 -
Question
Solution
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\(\LaTeX\)
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Exercise:
Eine Masse msikg hängt an einem Seil. enumerate item Wie gross muss eine waagrecht an der Masse angreife Kraft sein damit das Seil einen Winkel von degr mit der Vertikalen bildet? Skizze! item Wie gross wird der Winkel wenn man diese Kraft verdoppelt? item Welchen Zug muss in beiden Fällen das Seil aushalten? enumerate
Solution:
Geg.: msikg Aus der Skizze werden die Kräfte ersichtlich: figureH centering tikzpicture draw --node left l .; draw dashed .--.; draw .. arc :.:. node at .. alpha; filldraw fillgray! thick circle .; draw -latexvery thick --- node below vfg; draw -latexvery thick --.. node left vecF_mathrmS; draw -latexvery thick ---. node above vecF_mathrmh; scopexshift-cmscale. fill colorred! --.--..; draw .. arc :.:. node at .. alpha; draw -latexvery thick ..--node right vfg.; draw -latexvery thick -- node left vecF_mathrmS ..; draw -latexvery thick .-- node below vecF_mathrmh ; scope draw --; fill patternnorth east lines rectangle .; tikzpicture figure Da der Körper in Ruhe ist herrscht Kräftegleichgewicht. enumerate item Geg.: alphadegr Ges.: F_mathrmh Wen wir die Methode «geschlossenes Kräftedreieck» an so erhalten wir direkt: F_mathrmhsscFGtanalpham g tanalpharesN item Ges.: alpha_ für F_mathrmh. Wir verfahren analog zu a: F_mathrmhm g tanalpha_Ra alpha_arctanleftfracF_mathrmhm grightresdegr item Ges.: Die Seilkräfte F_mathrmS und F_mathrmS für beide Fälle a und b: F_mathrmSifracm gcosalpha_i Damit erhalten wir: F_mathrmSresNqquadqquad F_mathrmSresN enumerate
Eine Masse msikg hängt an einem Seil. enumerate item Wie gross muss eine waagrecht an der Masse angreife Kraft sein damit das Seil einen Winkel von degr mit der Vertikalen bildet? Skizze! item Wie gross wird der Winkel wenn man diese Kraft verdoppelt? item Welchen Zug muss in beiden Fällen das Seil aushalten? enumerate
Solution:
Geg.: msikg Aus der Skizze werden die Kräfte ersichtlich: figureH centering tikzpicture draw --node left l .; draw dashed .--.; draw .. arc :.:. node at .. alpha; filldraw fillgray! thick circle .; draw -latexvery thick --- node below vfg; draw -latexvery thick --.. node left vecF_mathrmS; draw -latexvery thick ---. node above vecF_mathrmh; scopexshift-cmscale. fill colorred! --.--..; draw .. arc :.:. node at .. alpha; draw -latexvery thick ..--node right vfg.; draw -latexvery thick -- node left vecF_mathrmS ..; draw -latexvery thick .-- node below vecF_mathrmh ; scope draw --; fill patternnorth east lines rectangle .; tikzpicture figure Da der Körper in Ruhe ist herrscht Kräftegleichgewicht. enumerate item Geg.: alphadegr Ges.: F_mathrmh Wen wir die Methode «geschlossenes Kräftedreieck» an so erhalten wir direkt: F_mathrmhsscFGtanalpham g tanalpharesN item Ges.: alpha_ für F_mathrmh. Wir verfahren analog zu a: F_mathrmhm g tanalpha_Ra alpha_arctanleftfracF_mathrmhm grightresdegr item Ges.: Die Seilkräfte F_mathrmS und F_mathrmS für beide Fälle a und b: F_mathrmSifracm gcosalpha_i Damit erhalten wir: F_mathrmSresNqquadqquad F_mathrmSresN enumerate
Meta Information
Exercise:
Eine Masse msikg hängt an einem Seil. enumerate item Wie gross muss eine waagrecht an der Masse angreife Kraft sein damit das Seil einen Winkel von degr mit der Vertikalen bildet? Skizze! item Wie gross wird der Winkel wenn man diese Kraft verdoppelt? item Welchen Zug muss in beiden Fällen das Seil aushalten? enumerate
Solution:
Geg.: msikg Aus der Skizze werden die Kräfte ersichtlich: figureH centering tikzpicture draw --node left l .; draw dashed .--.; draw .. arc :.:. node at .. alpha; filldraw fillgray! thick circle .; draw -latexvery thick --- node below vfg; draw -latexvery thick --.. node left vecF_mathrmS; draw -latexvery thick ---. node above vecF_mathrmh; scopexshift-cmscale. fill colorred! --.--..; draw .. arc :.:. node at .. alpha; draw -latexvery thick ..--node right vfg.; draw -latexvery thick -- node left vecF_mathrmS ..; draw -latexvery thick .-- node below vecF_mathrmh ; scope draw --; fill patternnorth east lines rectangle .; tikzpicture figure Da der Körper in Ruhe ist herrscht Kräftegleichgewicht. enumerate item Geg.: alphadegr Ges.: F_mathrmh Wen wir die Methode «geschlossenes Kräftedreieck» an so erhalten wir direkt: F_mathrmhsscFGtanalpham g tanalpharesN item Ges.: alpha_ für F_mathrmh. Wir verfahren analog zu a: F_mathrmhm g tanalpha_Ra alpha_arctanleftfracF_mathrmhm grightresdegr item Ges.: Die Seilkräfte F_mathrmS und F_mathrmS für beide Fälle a und b: F_mathrmSifracm gcosalpha_i Damit erhalten wir: F_mathrmSresNqquadqquad F_mathrmSresN enumerate
Eine Masse msikg hängt an einem Seil. enumerate item Wie gross muss eine waagrecht an der Masse angreife Kraft sein damit das Seil einen Winkel von degr mit der Vertikalen bildet? Skizze! item Wie gross wird der Winkel wenn man diese Kraft verdoppelt? item Welchen Zug muss in beiden Fällen das Seil aushalten? enumerate
Solution:
Geg.: msikg Aus der Skizze werden die Kräfte ersichtlich: figureH centering tikzpicture draw --node left l .; draw dashed .--.; draw .. arc :.:. node at .. alpha; filldraw fillgray! thick circle .; draw -latexvery thick --- node below vfg; draw -latexvery thick --.. node left vecF_mathrmS; draw -latexvery thick ---. node above vecF_mathrmh; scopexshift-cmscale. fill colorred! --.--..; draw .. arc :.:. node at .. alpha; draw -latexvery thick ..--node right vfg.; draw -latexvery thick -- node left vecF_mathrmS ..; draw -latexvery thick .-- node below vecF_mathrmh ; scope draw --; fill patternnorth east lines rectangle .; tikzpicture figure Da der Körper in Ruhe ist herrscht Kräftegleichgewicht. enumerate item Geg.: alphadegr Ges.: F_mathrmh Wen wir die Methode «geschlossenes Kräftedreieck» an so erhalten wir direkt: F_mathrmhsscFGtanalpham g tanalpharesN item Ges.: alpha_ für F_mathrmh. Wir verfahren analog zu a: F_mathrmhm g tanalpha_Ra alpha_arctanleftfracF_mathrmhm grightresdegr item Ges.: Die Seilkräfte F_mathrmS und F_mathrmS für beide Fälle a und b: F_mathrmSifracm gcosalpha_i Damit erhalten wir: F_mathrmSresNqquadqquad F_mathrmSresN enumerate
Contained in these collections:

