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                                      VECTORIAL AND ESCALAR MAGNITUDES.



* Activity 1.11  :  Vectorial and scalar magnitudes.                  ( 9/8/17   Friday )


1.11.a   Studying scalar and vectorial magnitudes  :     ( 10 points ).

        Magnitude is every property that can be messured, like speed, weight, acceleration, mass, density, electrical conductivity, velocity, force, capacity, volum, etc.

                             - Some magnitude only need a number or quantity to be defined like the capacity and volum a bottle has, like 30 oz, or 2 liters, etc.

                             - Another magnitudes, like forces, velocity, etc, need both a number and a direction or vector, because they need to be determined by a direction. We must indicate in which direction, using an arrow, it goes. For instance the velocity and acceleracion a car is having need a vector, but the speed does not because speed is only a number.

                                                                                MAGNITUDE

                                                                   Vectorial magnitude example.




1.11.b    Speed and velocity     ( 5 points ) :                                                  ( 9/11/17   Monday )


                 1.11.b.1  Reviewing test about vectorial and scalar magnitudes.  ( 5 points ).


                                 Vectorial and scalar magnitudes’ outline picture on the whiteboard.

                                                                             1.11.b.1 FILE

 

                                                                                                                                         ( 9/12/17   Tuesday )

                 1.11.b.2   Finishing drawings from yesterday.  Test-learning activity with the whole group about forces and vectors.    ( 5 points ).


                                                                             1.11.b.1 FILE

                                                                                 1.11.b.2 FILE



                                                                                                               ( 9/13/17   Wednesday )

     1.11.b.3Difference between speed ( scalar magnitude ) and velocity , force ( vectorial magnitudes ).


                         Copy the following outline in your workbook in order to check the difference between the scalar variable of speed and the vectorial one of velocity :


                                Outline picture from whiteboard about speed and velocity.


                   1.11.b.3.1  Reviewing activity 1 about drawing vectors and forces.  ( 5 points ).
                                 
                                    Reviewing activity 2 about drawing vectors and forces.  ( 5 points ).


          Speed has no direction while velocity does. For example, if I say that I’m running at 10 mph, I have given you my speed. If I say that I’m running 10 mph north, then I have given you my velocity.

           The short answer is that velocity is the speed with a direction, while speed does not have a direction. Speed is a scalar quantity -- it is the magnitude of the velocity. Speed is measured in units of distance divided by time, e.g. miles per hour, feet per second, meters per second, etc.



                                                                                                                             ( 9/14/17   Thursday )

                   1.11.b.3.2   Make the following drawings at your workbook and indicate the forces the cars are doing, their vectors, directions, speed and velocities’ vectors : ( 10 points ).  

TRUE OR FALSE ABOUT FORCES AND SPEED ? :  ( 5 points each ).

                                               Speed and velocity questions to answer (true or false).

                                                                        Speed and velocity 1

                                                                        Speed and velocity 2

                                                            Pointing out the parts of a force activity.


 1.11.c    Forces, vectorial magnitude. Parts of a force   ( 10 points ).              


          1.11.c.1  Therefore we can say that velocity is a vectorial magnitude and speed is a scalar magnitude. The same about forces, when a force is indicated a vector (arrow) is needed as well as the number or value, so a force is a vectorial magnitude.

    ( 5 points )

                                                                       FORCES (Magnitude).


                                                                        APPLICATION POINT


                 FORCES ARE MEASURED IN NEWTONS, THAT IS THE UNIT OF A FORCE, AND IT IS MEASURED WITH A DYNAMOMETER.


                                                                            Dynamometer 

                               A dynamometer or "dyno" for short, is a device for measuring forces.



         1.11.c.2    - Parts of a force :  ( 5 points ).


                                                                              Force’s parts 1.

                                                                              Force’s parts 2.

                                                                         Magnitude and direction.


    - Exercises about vectors, forces and force’s vector parts :


                                                                                 EXERCISES



                                                                                                                                ( 9/15/17   Friday )


     - 1.12    Friday activities about forces and its effects   ( 20 points ). 

          
                                a.  Friday activities ( YOU CAN CHOOSE AMONG THESE POSSIBILITIES ).


                                                                National geographic magazines.


                                b. You can also choose to do these cross and searchwords :

                                                                              Crossword
     
                                                                              Searchword






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