Press- und Druckkolben
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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Video
\(\LaTeX\)
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Exercise:
Die textbfRadien der kreisförmigen Press- und Druckkolben einer hydraulischen Presse betragen .m und .cm. Der Presskolben soll eine Kraft von kN ausüben Skizze. enumerate item Welcher Kolben Press- oder Druckkolben hat den grösseren Durchmesser? item Wie gross muss die Kraft auf den Druckkolben sein? item Wie gross ist der Druck in der Presse? enumerate
Solution:
enumerate item Der Presskolben hat den grösseren Durchmesser. item Da der Druck in der Flüssigkeit überall gleich gross ist gilt pfracFA longrightarrow fracF_kA_kfracF_gA_g longrightarrow F_kfracA_kA_g F_g left fracr_kr_g right^ F_g left frac.cmcm right^ kN kN item pfracFA fracF_gA_g fracF_gpi r_g^ fraceNpi .m^ &approx ePabar enumerate
Die textbfRadien der kreisförmigen Press- und Druckkolben einer hydraulischen Presse betragen .m und .cm. Der Presskolben soll eine Kraft von kN ausüben Skizze. enumerate item Welcher Kolben Press- oder Druckkolben hat den grösseren Durchmesser? item Wie gross muss die Kraft auf den Druckkolben sein? item Wie gross ist der Druck in der Presse? enumerate
Solution:
enumerate item Der Presskolben hat den grösseren Durchmesser. item Da der Druck in der Flüssigkeit überall gleich gross ist gilt pfracFA longrightarrow fracF_kA_kfracF_gA_g longrightarrow F_kfracA_kA_g F_g left fracr_kr_g right^ F_g left frac.cmcm right^ kN kN item pfracFA fracF_gA_g fracF_gpi r_g^ fraceNpi .m^ &approx ePabar enumerate
Meta Information
Exercise:
Die textbfRadien der kreisförmigen Press- und Druckkolben einer hydraulischen Presse betragen .m und .cm. Der Presskolben soll eine Kraft von kN ausüben Skizze. enumerate item Welcher Kolben Press- oder Druckkolben hat den grösseren Durchmesser? item Wie gross muss die Kraft auf den Druckkolben sein? item Wie gross ist der Druck in der Presse? enumerate
Solution:
enumerate item Der Presskolben hat den grösseren Durchmesser. item Da der Druck in der Flüssigkeit überall gleich gross ist gilt pfracFA longrightarrow fracF_kA_kfracF_gA_g longrightarrow F_kfracA_kA_g F_g left fracr_kr_g right^ F_g left frac.cmcm right^ kN kN item pfracFA fracF_gA_g fracF_gpi r_g^ fraceNpi .m^ &approx ePabar enumerate
Die textbfRadien der kreisförmigen Press- und Druckkolben einer hydraulischen Presse betragen .m und .cm. Der Presskolben soll eine Kraft von kN ausüben Skizze. enumerate item Welcher Kolben Press- oder Druckkolben hat den grösseren Durchmesser? item Wie gross muss die Kraft auf den Druckkolben sein? item Wie gross ist der Druck in der Presse? enumerate
Solution:
enumerate item Der Presskolben hat den grösseren Durchmesser. item Da der Druck in der Flüssigkeit überall gleich gross ist gilt pfracFA longrightarrow fracF_kA_kfracF_gA_g longrightarrow F_kfracA_kA_g F_g left fracr_kr_g right^ F_g left frac.cmcm right^ kN kN item pfracFA fracF_gA_g fracF_gpi r_g^ fraceNpi .m^ &approx ePabar enumerate
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