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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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Exercise:
Ein Pel der Masse m_.sikg und der Länge l.sim wird um den Winkel alphadegr ausgelenkt und losgelassen. Am untersten Punkt trifft es auf einen Klotz der Masse m_.sikg. Der Klotz gleitet nach dem Stoss über die Unterlage wobei der Reibungskoeffizient mu. beträgt. Wie weit gleitet der Klotz bis zum Stillstand falls das Pel nach dem Stoss wieder um degr ausgelenkt wird? figureH centering tikzpicturelatexscale. draw fillgray! . rectangle . nodemidway m_ ; fill patternnorth west linespattern colorgray! rectangle -. ; draw thick --; fill patternnorth east linespattern colorgray! - rectangle .; draw thick ---; draw dashedthick . -- .; draw dashed .. arc ::.; scope rotate around-:. %Pel draw very thick ..-- nodeleftxshift-.cm l .; draw fillgray! .. circle . nodeleftxshift-.cm m_; scope draw .. arc ::. node at .. alpha; tikzpicture figure
Solution:
Geg.: m_.sikg l.sim alphadegr m_.sikg mu. Ges.: s figureH centering tikzpicturelatexscale. draw fillgray! . rectangle . nodemidway m_ ; fill patternnorth west linespattern colorgray! rectangle -. ; draw thick --; fill patternnorth east linespattern colorgray! - rectangle .; draw thick ---; draw dashedthick . -- .; draw dashed .. arc ::.; scope rotate around-:. %Pel draw very thick ..-- nodeleftxshift-.cm l .; draw fillgray! .. circle . nodeleftxshift-.cm m_; scope draw .. arc ::. node at .. alpha; %Für die Lösung: draw dashed ..---..; draw dashed ..---..; draw - -..--nodeleft h -..; draw decorationbracemirrordecoratexshift.cm ..-- noderight l-h .; tikzpicture figure Pelbewegung mit Energieerhaltung: Das Pel wird aus der Höhe h losgelassen: E_mathrmpotE_mathrmkinRa m_ghfracm_v_^Ra v_sqrtgh h aus der Geometrie: cosalphafracl-hlRa hl-cosalpha.sim Für die Impulserhaltung gilt mit m_v_ Klotz vor dem Stoss und m_u_ Pel nach dem Stoss: m_v_-m_u_+m_u_Ra u_fracm_v_+u_m_fracm_v_+sqrtgh'm_ h' ist nach Gl. mit alpha'degr: hl-cosalpha'.sim Die ganze kinetische Energie des Klotzes wird in Reibungsarbeit umgewandelt: fracm_u_^F_mathrmR s Ra fracbcancelm_u_^mubcancelm_g s Ra sfracu_^mugres.m
Ein Pel der Masse m_.sikg und der Länge l.sim wird um den Winkel alphadegr ausgelenkt und losgelassen. Am untersten Punkt trifft es auf einen Klotz der Masse m_.sikg. Der Klotz gleitet nach dem Stoss über die Unterlage wobei der Reibungskoeffizient mu. beträgt. Wie weit gleitet der Klotz bis zum Stillstand falls das Pel nach dem Stoss wieder um degr ausgelenkt wird? figureH centering tikzpicturelatexscale. draw fillgray! . rectangle . nodemidway m_ ; fill patternnorth west linespattern colorgray! rectangle -. ; draw thick --; fill patternnorth east linespattern colorgray! - rectangle .; draw thick ---; draw dashedthick . -- .; draw dashed .. arc ::.; scope rotate around-:. %Pel draw very thick ..-- nodeleftxshift-.cm l .; draw fillgray! .. circle . nodeleftxshift-.cm m_; scope draw .. arc ::. node at .. alpha; tikzpicture figure
Solution:
Geg.: m_.sikg l.sim alphadegr m_.sikg mu. Ges.: s figureH centering tikzpicturelatexscale. draw fillgray! . rectangle . nodemidway m_ ; fill patternnorth west linespattern colorgray! rectangle -. ; draw thick --; fill patternnorth east linespattern colorgray! - rectangle .; draw thick ---; draw dashedthick . -- .; draw dashed .. arc ::.; scope rotate around-:. %Pel draw very thick ..-- nodeleftxshift-.cm l .; draw fillgray! .. circle . nodeleftxshift-.cm m_; scope draw .. arc ::. node at .. alpha; %Für die Lösung: draw dashed ..---..; draw dashed ..---..; draw - -..--nodeleft h -..; draw decorationbracemirrordecoratexshift.cm ..-- noderight l-h .; tikzpicture figure Pelbewegung mit Energieerhaltung: Das Pel wird aus der Höhe h losgelassen: E_mathrmpotE_mathrmkinRa m_ghfracm_v_^Ra v_sqrtgh h aus der Geometrie: cosalphafracl-hlRa hl-cosalpha.sim Für die Impulserhaltung gilt mit m_v_ Klotz vor dem Stoss und m_u_ Pel nach dem Stoss: m_v_-m_u_+m_u_Ra u_fracm_v_+u_m_fracm_v_+sqrtgh'm_ h' ist nach Gl. mit alpha'degr: hl-cosalpha'.sim Die ganze kinetische Energie des Klotzes wird in Reibungsarbeit umgewandelt: fracm_u_^F_mathrmR s Ra fracbcancelm_u_^mubcancelm_g s Ra sfracu_^mugres.m
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Exercise:
Ein Pel der Masse m_.sikg und der Länge l.sim wird um den Winkel alphadegr ausgelenkt und losgelassen. Am untersten Punkt trifft es auf einen Klotz der Masse m_.sikg. Der Klotz gleitet nach dem Stoss über die Unterlage wobei der Reibungskoeffizient mu. beträgt. Wie weit gleitet der Klotz bis zum Stillstand falls das Pel nach dem Stoss wieder um degr ausgelenkt wird? figureH centering tikzpicturelatexscale. draw fillgray! . rectangle . nodemidway m_ ; fill patternnorth west linespattern colorgray! rectangle -. ; draw thick --; fill patternnorth east linespattern colorgray! - rectangle .; draw thick ---; draw dashedthick . -- .; draw dashed .. arc ::.; scope rotate around-:. %Pel draw very thick ..-- nodeleftxshift-.cm l .; draw fillgray! .. circle . nodeleftxshift-.cm m_; scope draw .. arc ::. node at .. alpha; tikzpicture figure
Solution:
Geg.: m_.sikg l.sim alphadegr m_.sikg mu. Ges.: s figureH centering tikzpicturelatexscale. draw fillgray! . rectangle . nodemidway m_ ; fill patternnorth west linespattern colorgray! rectangle -. ; draw thick --; fill patternnorth east linespattern colorgray! - rectangle .; draw thick ---; draw dashedthick . -- .; draw dashed .. arc ::.; scope rotate around-:. %Pel draw very thick ..-- nodeleftxshift-.cm l .; draw fillgray! .. circle . nodeleftxshift-.cm m_; scope draw .. arc ::. node at .. alpha; %Für die Lösung: draw dashed ..---..; draw dashed ..---..; draw - -..--nodeleft h -..; draw decorationbracemirrordecoratexshift.cm ..-- noderight l-h .; tikzpicture figure Pelbewegung mit Energieerhaltung: Das Pel wird aus der Höhe h losgelassen: E_mathrmpotE_mathrmkinRa m_ghfracm_v_^Ra v_sqrtgh h aus der Geometrie: cosalphafracl-hlRa hl-cosalpha.sim Für die Impulserhaltung gilt mit m_v_ Klotz vor dem Stoss und m_u_ Pel nach dem Stoss: m_v_-m_u_+m_u_Ra u_fracm_v_+u_m_fracm_v_+sqrtgh'm_ h' ist nach Gl. mit alpha'degr: hl-cosalpha'.sim Die ganze kinetische Energie des Klotzes wird in Reibungsarbeit umgewandelt: fracm_u_^F_mathrmR s Ra fracbcancelm_u_^mubcancelm_g s Ra sfracu_^mugres.m
Ein Pel der Masse m_.sikg und der Länge l.sim wird um den Winkel alphadegr ausgelenkt und losgelassen. Am untersten Punkt trifft es auf einen Klotz der Masse m_.sikg. Der Klotz gleitet nach dem Stoss über die Unterlage wobei der Reibungskoeffizient mu. beträgt. Wie weit gleitet der Klotz bis zum Stillstand falls das Pel nach dem Stoss wieder um degr ausgelenkt wird? figureH centering tikzpicturelatexscale. draw fillgray! . rectangle . nodemidway m_ ; fill patternnorth west linespattern colorgray! rectangle -. ; draw thick --; fill patternnorth east linespattern colorgray! - rectangle .; draw thick ---; draw dashedthick . -- .; draw dashed .. arc ::.; scope rotate around-:. %Pel draw very thick ..-- nodeleftxshift-.cm l .; draw fillgray! .. circle . nodeleftxshift-.cm m_; scope draw .. arc ::. node at .. alpha; tikzpicture figure
Solution:
Geg.: m_.sikg l.sim alphadegr m_.sikg mu. Ges.: s figureH centering tikzpicturelatexscale. draw fillgray! . rectangle . nodemidway m_ ; fill patternnorth west linespattern colorgray! rectangle -. ; draw thick --; fill patternnorth east linespattern colorgray! - rectangle .; draw thick ---; draw dashedthick . -- .; draw dashed .. arc ::.; scope rotate around-:. %Pel draw very thick ..-- nodeleftxshift-.cm l .; draw fillgray! .. circle . nodeleftxshift-.cm m_; scope draw .. arc ::. node at .. alpha; %Für die Lösung: draw dashed ..---..; draw dashed ..---..; draw - -..--nodeleft h -..; draw decorationbracemirrordecoratexshift.cm ..-- noderight l-h .; tikzpicture figure Pelbewegung mit Energieerhaltung: Das Pel wird aus der Höhe h losgelassen: E_mathrmpotE_mathrmkinRa m_ghfracm_v_^Ra v_sqrtgh h aus der Geometrie: cosalphafracl-hlRa hl-cosalpha.sim Für die Impulserhaltung gilt mit m_v_ Klotz vor dem Stoss und m_u_ Pel nach dem Stoss: m_v_-m_u_+m_u_Ra u_fracm_v_+u_m_fracm_v_+sqrtgh'm_ h' ist nach Gl. mit alpha'degr: hl-cosalpha'.sim Die ganze kinetische Energie des Klotzes wird in Reibungsarbeit umgewandelt: fracm_u_^F_mathrmR s Ra fracbcancelm_u_^mubcancelm_g s Ra sfracu_^mugres.m
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