Raketengleichung
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 Rakete bewegt sich deshalb vorwärts weil sie einen Teil ihrer Masse nach hen ausstösst. Die Austossrate der Masse ist variabel zeitabhängig dotm wobei m die momentane Masse der Rakete bezeichnet. Der Treibstoff wird mit der konstanten Geschwindigkeit tilde v ausgestossen und v ist die Geschwindigkeit der Rakete. abcliste abc Begründe mit Impulserhaltung warum die Geschwindigkeit der Rakete folger Differentialgleichung gehorcht: * mdotv-dotm tilde v-mg * abc Löse diese Differentialgleichung nach vm auf. abcliste
Solution:
abcliste abc Die Änderung des Impulses des Systems Rakete/Treibstoff entspricht der Gewichtskraft: fracmboxdpmboxdt F fracmboxdp_rmboxdt+fracmboxdp_tmboxdt F fracmboxdmvmboxdt + fracmboxdm_tv_tmboxdt -mg fracmboxdmmboxdt v + m fracmboxdvmboxdt - fracmboxdmmboxdt v_t - m fracmboxdv_tmboxdt -mg dot m v + mdot v - dot m v-v_r - -mg mdot v + dot m v_r - -mg abc Beide Seiten der Gleichung mit fracmboxdtm multiplizieren führt auf: mboxdv + fracmboxdmm v_r -gmboxdt _v_^v mboxdv + _m_^m fracmboxdmm v_r -_t_^t gmboxdt v-v_ + v_r lnfracmm_ -gt-t_ abcliste
Eine Rakete bewegt sich deshalb vorwärts weil sie einen Teil ihrer Masse nach hen ausstösst. Die Austossrate der Masse ist variabel zeitabhängig dotm wobei m die momentane Masse der Rakete bezeichnet. Der Treibstoff wird mit der konstanten Geschwindigkeit tilde v ausgestossen und v ist die Geschwindigkeit der Rakete. abcliste abc Begründe mit Impulserhaltung warum die Geschwindigkeit der Rakete folger Differentialgleichung gehorcht: * mdotv-dotm tilde v-mg * abc Löse diese Differentialgleichung nach vm auf. abcliste
Solution:
abcliste abc Die Änderung des Impulses des Systems Rakete/Treibstoff entspricht der Gewichtskraft: fracmboxdpmboxdt F fracmboxdp_rmboxdt+fracmboxdp_tmboxdt F fracmboxdmvmboxdt + fracmboxdm_tv_tmboxdt -mg fracmboxdmmboxdt v + m fracmboxdvmboxdt - fracmboxdmmboxdt v_t - m fracmboxdv_tmboxdt -mg dot m v + mdot v - dot m v-v_r - -mg mdot v + dot m v_r - -mg abc Beide Seiten der Gleichung mit fracmboxdtm multiplizieren führt auf: mboxdv + fracmboxdmm v_r -gmboxdt _v_^v mboxdv + _m_^m fracmboxdmm v_r -_t_^t gmboxdt v-v_ + v_r lnfracmm_ -gt-t_ abcliste
Meta Information
Exercise:
Eine Rakete bewegt sich deshalb vorwärts weil sie einen Teil ihrer Masse nach hen ausstösst. Die Austossrate der Masse ist variabel zeitabhängig dotm wobei m die momentane Masse der Rakete bezeichnet. Der Treibstoff wird mit der konstanten Geschwindigkeit tilde v ausgestossen und v ist die Geschwindigkeit der Rakete. abcliste abc Begründe mit Impulserhaltung warum die Geschwindigkeit der Rakete folger Differentialgleichung gehorcht: * mdotv-dotm tilde v-mg * abc Löse diese Differentialgleichung nach vm auf. abcliste
Solution:
abcliste abc Die Änderung des Impulses des Systems Rakete/Treibstoff entspricht der Gewichtskraft: fracmboxdpmboxdt F fracmboxdp_rmboxdt+fracmboxdp_tmboxdt F fracmboxdmvmboxdt + fracmboxdm_tv_tmboxdt -mg fracmboxdmmboxdt v + m fracmboxdvmboxdt - fracmboxdmmboxdt v_t - m fracmboxdv_tmboxdt -mg dot m v + mdot v - dot m v-v_r - -mg mdot v + dot m v_r - -mg abc Beide Seiten der Gleichung mit fracmboxdtm multiplizieren führt auf: mboxdv + fracmboxdmm v_r -gmboxdt _v_^v mboxdv + _m_^m fracmboxdmm v_r -_t_^t gmboxdt v-v_ + v_r lnfracmm_ -gt-t_ abcliste
Eine Rakete bewegt sich deshalb vorwärts weil sie einen Teil ihrer Masse nach hen ausstösst. Die Austossrate der Masse ist variabel zeitabhängig dotm wobei m die momentane Masse der Rakete bezeichnet. Der Treibstoff wird mit der konstanten Geschwindigkeit tilde v ausgestossen und v ist die Geschwindigkeit der Rakete. abcliste abc Begründe mit Impulserhaltung warum die Geschwindigkeit der Rakete folger Differentialgleichung gehorcht: * mdotv-dotm tilde v-mg * abc Löse diese Differentialgleichung nach vm auf. abcliste
Solution:
abcliste abc Die Änderung des Impulses des Systems Rakete/Treibstoff entspricht der Gewichtskraft: fracmboxdpmboxdt F fracmboxdp_rmboxdt+fracmboxdp_tmboxdt F fracmboxdmvmboxdt + fracmboxdm_tv_tmboxdt -mg fracmboxdmmboxdt v + m fracmboxdvmboxdt - fracmboxdmmboxdt v_t - m fracmboxdv_tmboxdt -mg dot m v + mdot v - dot m v-v_r - -mg mdot v + dot m v_r - -mg abc Beide Seiten der Gleichung mit fracmboxdtm multiplizieren führt auf: mboxdv + fracmboxdmm v_r -gmboxdt _v_^v mboxdv + _m_^m fracmboxdmm v_r -_t_^t gmboxdt v-v_ + v_r lnfracmm_ -gt-t_ abcliste
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DGL in der Physik 1 by uz