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 - First of all we are gonna check a few important questions about forces in dynamics to understand what it means :

 



     * ( Here I’ll post several videos or more links about dynamics in the following days).



  - Make sure that you study and look the following important ítems up :

     1) Forces on an object.
     2) Tension forcé.
     3) Newton's First law.
     4) Inertia and mass.
     5) State of motion.
     6) Balances and unbalanced forces.
     7) Meaning of force.
     8) Types of forces.
     9) Drawing Free-body diagrams.
     10) Determining the net force.
     11) Newton's second law.
     12) Finding acceleration.
     13) Newton's third law.
     14) Hooke's law.
     15) Equilibrium.
     16) Centre of gravity.
     17) Weight.
     18) Types of collision.













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 - Watch the following videos about so many different kind of forces we can check :














  > LEVITRON.










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             MAY THE FORCE BE WITH YOU !!!



- We’re gonna check first a nice exam example about this lesson and you’ll see how easy is handle or deal with this kind of exercises. You only have to put up with me or bearing me for a while :

(THIS EXERCISES HAVE BEEN TAKEN FROM THE OTHER PHYSICS TEACHER "ISABEL DE LLANÇA" AND HAVE BEEN VERY WELL PREPARED ).



                                     EXAM EXAMPLE 1          

                        EXAM EXAMPLE exercises 1,2,3 and 4 RESOLUTION           
                                           
                        EXAM EXAMPLE exercise 5 RESOLUTION

                        EXAM EXAMPLE exercise 6 RESOLUTION

                        EXAM EXAMPLE exercise 7 RESOLUTION

                        EXAM EXAMPLE exercise 8 RESOLUTION



 - You can follow a nice explanation video about NON CONCURRENT PARALLEL FORCES separated certain distance :










  -  After you’ve practiced and watched the different videos, try to do the following exercise by your own. Check previous videos as many times as you need to develope the exercise by yourself. In case you cannot achieve the problem’s solution you have the problem explained at the video below :


  > Exercise :

          A 15kg metal bar 6m long has two objects hanged at the opposite ends of the bar. At the left end of the bar hangs an 20kg object and at the right end of the bar the second 30kg object. Find where exactly the net force must be placed in order not to let the system fall. Work out the value of the net or balance force, the exact spot it must be placed, the direction and its sense.










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   - Check the following link to begin the next lesson about how forces act :




                                                 FORCES AND DYNAMICS.




















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- At this article will be hung pictures and video about uniform circular motion practice we did yesterday using the skates :




   >  VIDEO.





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 - This is a little drawing about the practice we have done of the uniform circular motion with our skates using a spinning movement at the playground.
    On friday we’ll check the times and data we have taken and will work out angular velocity and will talk about all of this.












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     >    Fes click al següent enllaç, llegeix i fes els exercicis resolts :
       
     

                                                          LES ESCALES.




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   - Try to do this exercise. If you cannot achieve it, watch the video and look at and listen to the explanation, but try first doing it without watching the video :



  > Exercise :

           A Stone is thrown from the top of a building with an initial velocity of 20m/s straight upward. The building is 50m high, and the Stone just misses the edge of the roof on its way down. Determine :

 a) The time needed for the Stone to reach its máximum height.
 b) The máximum height.
 c) The time needed for the Stone to return to the level of the thrower.
 d) The velocity of the Stone at this instant.
 e) The velocity and position of the Stone at time = 5 secons.


                                                      VIDEO WITH THE PROBLEM’S SOLUTION.





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  -  Let's look the following link up in order to learn about circular motion :


 
                                                           CIRCULAR MOTION THINGLINK.





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    -  Watch the following video and later we will do a similar exercise all together :

       








-  Watch the previous video and the next ones you find below and try to do the following two exercises at home :  (you still have the videos with the solution in case you don’t know how to finish them).



1-    Problem 1 :

        a) A child throws just upright to the sky a little stone with a starting velocity of 6 m/s.  Find the time the Stone takes to reach the higher position.

        b) After that, work out the distance this stone goes over when it finally hits the ground at the end of its movement. How long does the Stone take to arrive again to the ground from its higher position on the top?.

        c) Work out the total displacement the stone does from the beginning to the end of its movement and the total time of this movement from the beginning to the end.


                         VIDEO 1 WITH THE PROBLEM’S SOLUTION.





2- Problem 2 :

    From the top of a skyscraper a stone is thrown in a straight line motion to the ground with a starting velocity of 2 m/s. if the stone takes 5 seconds to hit the ground, work out how high the skyscraper is.



                         VIDEO 2 WITH THE PROBLEM’S SOLUTION.

 (There is a mistake at the video because , as the Stone goes down some direction to gravity,  the starting velocity must have same sign as gravity, if I write minus sing for gravity I must write also minus sign for starting velocity.
   I should have written  - v0  instead of + v0 for the starting velocity. 
   So It must be written  :       0 = h - v0.t - 1/2.g.t2     ).

               Then the skyscraper’s high is :  h = 10 + 122’5 = 132’5 m







    Once you have tried to do these exercises and watched the videos, will you do a few more similar exercises next Friday in class. Then it is important you do at home the suggested activities on this article 118.


 DON’T FORGET TO DO THIS AT HOME!!!














   - Now that you have watched all these videos and last friday you have also tried a few more similar exercises in class, try now a few more ones like that at home as homework :


   Do exercises 43, 27, 58 and 59 from your book and have them ready on Monday.




                          
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- Our students explain in these videos , throughout a canvas poster,  what they consider as most important since they are studying the chemistry and physics subject this course :


    






















     >  Angel’s canvas video.





     >  Marina’s canvas video.

         Marina’s canvas poster can be seen on detail here.











    







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  -  Per les guardies que tindreu la propera semana del 13 al 17 de Febrer de 2017, haureu de fer el següent :

 


  > DILLUNS DIA 13 :  Primer de tot has de veure els seguents videos tutorials :



                                     VIDEO GIMP 1                           VIDEO GIMP 2                           VIDEO GIMP 3
 


    *  Després de  veure els videos fes la següent activitat :



  >  DILLUNS DIA 13 :    ACTIVITAT GIMP 1 : 

      Fes l’activitat que apareix al video 2 de dalt, pots buscar al google imatges semblants o les que a tu t’agradin.



  > DIMARTS DIA 14 :    ACTIVITAT GIMP 2 : 

     Fes l’activitat que apareix al video 3 de dalt, pots buscar al google imatges semblants o les que a tu t’agradin.



  > DIVENDRES DIA 17ACTIVITAT GIMP 3 : 

     Fes CLICK AQUÍ i fes l’activitat que veuràs al video. Pots fer-la buscant tu al google imatges que t’agradin a tu.



 - ACTIVITAT GIMP 4 i 5 (opcional ) 

    En cas de que ho hagis acabat tot i vulguis fer alguna altra activitat més, abans de que torni el profesor, pots afagar una imatge teva de carnet i retallar només la teva figura o cara i afegir-la a una altra imatge de fons amb un paisatge, ja sigui una platja, un volcán, o el que vulguis. Aquí tens uns exemples del que pots fer (pots afagar les imatges que tu vulguis del google per a fer aquestes activitats ) :



                                            Actitivat 4                                                     Activitat 5
  







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  - Here I post to you several links in which you can read and see the kind of questions you will find when doing this "competències bàsiques" test :


     * At the following link you can check every "competències bàsiques" test  :

                  ( The tests you did just last day are already posted also  ).



                                                   COMPETÈNCIES BÀSIQUES EXAMS.




     FILE 0   (Look up both questions and answers).

     FILE 0a (Aquest és el full on es posen les respostes del quadernet del file 0).

     FILE 0b (I aquí teniu el full de respostes omplert amb les respostes correctes).

     FILE 0c  (Aquí teniu l’explicació de cada resposta correcta perquè és correcta).



     FILE 1.  ( Look the questions and the answers in order to get used to them).
                   (Echa un vistazo tanto al tipo de preguntas como a la repuesta correcta
                    para acostumbrarte a ambas. Ves bajando a lo largo del archivo y verás
                    varios tipos de preguntas y su correspondiente respuesta).


     FILE 2.  (Aquí si aneu baixant pel PDF, a sota, trobareu exemples de preguntes i
                    la millor resposta).








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  -  Per la propera setmana que jo no hi seré a l'institut, cal que feu la següent feina tant a l'hora del taller com a l'hora que teniu a l'aula ordinària :


1)  Fer un dibuix en perspectiva cònica a un punt de fuga o a dos punts de fuga, a escollir, paregut al de la foto que veieu aquí a l'article 12.


2) Fer l'exercici 10 del final del tema 3 del llibre de la part d'exercicis. Cal copiar l'enunciat a la llibreta.


3) A l'hora de taller haureu de fer un resum a la llibreta, o esquema, de la part del llibre del tema 3 que parla de LES ESCALES.




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   - Fot the next week I will not be in class, you all have to do this work:




    > ON MONDAY 13TH FEBRUARY:   Make a poster at the page :

                                                           

                                                                 www.canva.com



      You’ll have to register at the page using an email address and a password and later you can begin to build your poster choosing the different images and elements the page offers you to create your poster.



     The poster you have to do can be about anything you like from all issues we have already studied since the beginning of the course.  It can be about chemistry, physics, movement, graphs, definitions, vocabulary, experiments, subjects, whatever you like about our chemistry and physics matter, etc.


        - At the following link you can see one poster exemple I have made :


                                                                      POSTER  EXAMPLE


                 ( Do click at my example in order to see the poster’s three pages).



    IT’S NOT NECESSARY TO DO THIS ACTIVITY THIS WEEK, YOU CAN DO IT THIS NEXT WEEKEND AT HOME OR NEXT WEEK IN CLASS DURING THE "GUARDIAS (on guard) " HOURS.






   > ON WEDNESDAY  15TH FEBRUARY:  

                               Do the "competències bàsiques exams" at article 116.






   > ON FRIDAY  17TH FEBRUARY


                               Go ahead with the "competències bàsiques", read the correct answers and the questions in article 116, read and look up the files I’ve posted in article 116.