Feuerwehrmann auf Leiter
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
Short
Video
\(\LaTeX\)
Need help? Yes, please!
The following quantities appear in the problem:
Drehmoment \(\vec M\) /
The following formulas must be used to solve the exercise:
\(\sum \stackrel{\curvearrowleft}{M} \stackrel{!}{=} \sum \stackrel{\curvearrowright}{M} \quad \)
Exercise:
Eine Feuerwehrleiter mit mLO Masse lehne an einer Wand. Die Haftreibungszahl zwischen Leiter und Wand betrage muLWO jene zwischen Leiter und Boden muLBO. Ein Feuerwehrmann mit mFO Masse habe frac der Leiterlänge erreicht als die Leiter zu rutschen ne. Wie gross ist der Winkel zwischen Leiter und Boden?
Solution:
center tikzpicturelatex filldrawcolorgreen!!white fillgreen!!white rectangle -.; filldrawcolorblack fillblack!!white rectangle ; drawvery thick --+:cm; drawvery thick ++:.cm--+:cm; drawvery thick colorred - ++:cm--+-:cm nodebelow sscFL; drawvery thick colorred - ++:.cm++:.cm--+-:cm nodebelow right sscFF; draw- colororange .--. nodemidway above sscellL; draw- colororange .--.. nodemidway above sscellF; draw- colorolive .--.. nodemidway left sscellW; draw- colorolive .--. nodemidway above sscellR; drawvery thick - colorblue .--+:cm nodeabove left sscFR; drawvery thick - colorblue .--+:cm nodeabove sscFW; drawvery thickcolordarkgreen- -- noderight below sscFB; drawvery thickcolordarkgreen- -- nodeabove left sscFN; filldrawcolorblack fillyellow circle mm; tikzpicture center bf Drehmomente: stackrelcurvearrowleftM stackrelcurvearrowrightM sscMW + sscMR sscML + sscMF sscellWsscFW + sscellRsscFR sscellLsscFL+sscellFF_texttiny F sscFW L sheta + sscmuW sscFW Lcostheta sscFL fracLcostheta + sscFF fracLcosthetalabelFwldm bf Kräfte x-Richtung: sscFW sscFB sscmuB sscFN bf Kräfte y-Richtung: sscFG sscFN + sscFR sscFL + sscFF sscFN + sscmuW sscFW Ausgeh von der x-Richtung sscFN substituier folgt: F_texttiny W sscmuBFN sscmuBsscFL + sscFF-sscmuW sscFW F_texttiny W fracmu_texttiny B+mu_texttiny Bmu_texttiny W F_texttiny L+F_texttiny F FW Eingesetzt bei der Drehmomentengleichung erhält man: sscFW L sheta leftfrac sscFL + fracsscFF -sscmuW sscFWright L costheta tantheta fracfrac sscFL + fracsscFF -sscmuW sscFWsscFW tanthQ theta thdegQ thradQ
Eine Feuerwehrleiter mit mLO Masse lehne an einer Wand. Die Haftreibungszahl zwischen Leiter und Wand betrage muLWO jene zwischen Leiter und Boden muLBO. Ein Feuerwehrmann mit mFO Masse habe frac der Leiterlänge erreicht als die Leiter zu rutschen ne. Wie gross ist der Winkel zwischen Leiter und Boden?
Solution:
center tikzpicturelatex filldrawcolorgreen!!white fillgreen!!white rectangle -.; filldrawcolorblack fillblack!!white rectangle ; drawvery thick --+:cm; drawvery thick ++:.cm--+:cm; drawvery thick colorred - ++:cm--+-:cm nodebelow sscFL; drawvery thick colorred - ++:.cm++:.cm--+-:cm nodebelow right sscFF; draw- colororange .--. nodemidway above sscellL; draw- colororange .--.. nodemidway above sscellF; draw- colorolive .--.. nodemidway left sscellW; draw- colorolive .--. nodemidway above sscellR; drawvery thick - colorblue .--+:cm nodeabove left sscFR; drawvery thick - colorblue .--+:cm nodeabove sscFW; drawvery thickcolordarkgreen- -- noderight below sscFB; drawvery thickcolordarkgreen- -- nodeabove left sscFN; filldrawcolorblack fillyellow circle mm; tikzpicture center bf Drehmomente: stackrelcurvearrowleftM stackrelcurvearrowrightM sscMW + sscMR sscML + sscMF sscellWsscFW + sscellRsscFR sscellLsscFL+sscellFF_texttiny F sscFW L sheta + sscmuW sscFW Lcostheta sscFL fracLcostheta + sscFF fracLcosthetalabelFwldm bf Kräfte x-Richtung: sscFW sscFB sscmuB sscFN bf Kräfte y-Richtung: sscFG sscFN + sscFR sscFL + sscFF sscFN + sscmuW sscFW Ausgeh von der x-Richtung sscFN substituier folgt: F_texttiny W sscmuBFN sscmuBsscFL + sscFF-sscmuW sscFW F_texttiny W fracmu_texttiny B+mu_texttiny Bmu_texttiny W F_texttiny L+F_texttiny F FW Eingesetzt bei der Drehmomentengleichung erhält man: sscFW L sheta leftfrac sscFL + fracsscFF -sscmuW sscFWright L costheta tantheta fracfrac sscFL + fracsscFF -sscmuW sscFWsscFW tanthQ theta thdegQ thradQ
Meta Information
Exercise:
Eine Feuerwehrleiter mit mLO Masse lehne an einer Wand. Die Haftreibungszahl zwischen Leiter und Wand betrage muLWO jene zwischen Leiter und Boden muLBO. Ein Feuerwehrmann mit mFO Masse habe frac der Leiterlänge erreicht als die Leiter zu rutschen ne. Wie gross ist der Winkel zwischen Leiter und Boden?
Solution:
center tikzpicturelatex filldrawcolorgreen!!white fillgreen!!white rectangle -.; filldrawcolorblack fillblack!!white rectangle ; drawvery thick --+:cm; drawvery thick ++:.cm--+:cm; drawvery thick colorred - ++:cm--+-:cm nodebelow sscFL; drawvery thick colorred - ++:.cm++:.cm--+-:cm nodebelow right sscFF; draw- colororange .--. nodemidway above sscellL; draw- colororange .--.. nodemidway above sscellF; draw- colorolive .--.. nodemidway left sscellW; draw- colorolive .--. nodemidway above sscellR; drawvery thick - colorblue .--+:cm nodeabove left sscFR; drawvery thick - colorblue .--+:cm nodeabove sscFW; drawvery thickcolordarkgreen- -- noderight below sscFB; drawvery thickcolordarkgreen- -- nodeabove left sscFN; filldrawcolorblack fillyellow circle mm; tikzpicture center bf Drehmomente: stackrelcurvearrowleftM stackrelcurvearrowrightM sscMW + sscMR sscML + sscMF sscellWsscFW + sscellRsscFR sscellLsscFL+sscellFF_texttiny F sscFW L sheta + sscmuW sscFW Lcostheta sscFL fracLcostheta + sscFF fracLcosthetalabelFwldm bf Kräfte x-Richtung: sscFW sscFB sscmuB sscFN bf Kräfte y-Richtung: sscFG sscFN + sscFR sscFL + sscFF sscFN + sscmuW sscFW Ausgeh von der x-Richtung sscFN substituier folgt: F_texttiny W sscmuBFN sscmuBsscFL + sscFF-sscmuW sscFW F_texttiny W fracmu_texttiny B+mu_texttiny Bmu_texttiny W F_texttiny L+F_texttiny F FW Eingesetzt bei der Drehmomentengleichung erhält man: sscFW L sheta leftfrac sscFL + fracsscFF -sscmuW sscFWright L costheta tantheta fracfrac sscFL + fracsscFF -sscmuW sscFWsscFW tanthQ theta thdegQ thradQ
Eine Feuerwehrleiter mit mLO Masse lehne an einer Wand. Die Haftreibungszahl zwischen Leiter und Wand betrage muLWO jene zwischen Leiter und Boden muLBO. Ein Feuerwehrmann mit mFO Masse habe frac der Leiterlänge erreicht als die Leiter zu rutschen ne. Wie gross ist der Winkel zwischen Leiter und Boden?
Solution:
center tikzpicturelatex filldrawcolorgreen!!white fillgreen!!white rectangle -.; filldrawcolorblack fillblack!!white rectangle ; drawvery thick --+:cm; drawvery thick ++:.cm--+:cm; drawvery thick colorred - ++:cm--+-:cm nodebelow sscFL; drawvery thick colorred - ++:.cm++:.cm--+-:cm nodebelow right sscFF; draw- colororange .--. nodemidway above sscellL; draw- colororange .--.. nodemidway above sscellF; draw- colorolive .--.. nodemidway left sscellW; draw- colorolive .--. nodemidway above sscellR; drawvery thick - colorblue .--+:cm nodeabove left sscFR; drawvery thick - colorblue .--+:cm nodeabove sscFW; drawvery thickcolordarkgreen- -- noderight below sscFB; drawvery thickcolordarkgreen- -- nodeabove left sscFN; filldrawcolorblack fillyellow circle mm; tikzpicture center bf Drehmomente: stackrelcurvearrowleftM stackrelcurvearrowrightM sscMW + sscMR sscML + sscMF sscellWsscFW + sscellRsscFR sscellLsscFL+sscellFF_texttiny F sscFW L sheta + sscmuW sscFW Lcostheta sscFL fracLcostheta + sscFF fracLcosthetalabelFwldm bf Kräfte x-Richtung: sscFW sscFB sscmuB sscFN bf Kräfte y-Richtung: sscFG sscFN + sscFR sscFL + sscFF sscFN + sscmuW sscFW Ausgeh von der x-Richtung sscFN substituier folgt: F_texttiny W sscmuBFN sscmuBsscFL + sscFF-sscmuW sscFW F_texttiny W fracmu_texttiny B+mu_texttiny Bmu_texttiny W F_texttiny L+F_texttiny F FW Eingesetzt bei der Drehmomentengleichung erhält man: sscFW L sheta leftfrac sscFL + fracsscFF -sscmuW sscFWright L costheta tantheta fracfrac sscFL + fracsscFF -sscmuW sscFWsscFW tanthQ theta thdegQ thradQ
Contained in these collections:
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Leiter an der Wand by TeXercises
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Asked Quantity:
Winkel \(\theta\)
in
Radian \(\rm rad\)
Physical Quantity
Unit