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* Activity 2.21   :   Roller coaster and energy.                             ( 11/27/17   Monday )




              KINETIC AND POTENTIAL


          2.21.a        Roller coaster and kinetic , potential energies.


                           Watch these pics and draw the roller coaster in your paper
                           indicating in each point what kind of energy is acting and how
                           potential and kinetic energies are changing in one another.


                    PICTURE 1                                     PICTURE 2                                 PICTURE 3

                                                           


                              You can remember here what kinetic energy is.


                                                                                                                                ( 10 points ).








             2.21.b        Roller coaster. Work out potential and kinetic energies.


                               Check the following roller coaster and considering each point’s hight
                               and the speed given, work out potentials and kinetics energies at the
                               different spots at this roller coaster.




                                                                     ROLLER COASTER




                                                                                                                                 ( 10 points ).










* Activity 2.22: Total mechanical energy, kinetic plus potential energies.  ( 11/28/17  Tuesday )




     2.22.a      Check the paper given  to you and work out the total Mechanical energy the ball
                     has at every different spot on the hills.




                                                                                                                                 ( 10 points ).






      2.22.b     At the following LINK check what Mechanical energy is and what it has to do
                     with potential and kinetic energy. 
                     Open a google doc file and explain there what mechanical energy is and explain
                     also what relationship is established among mechanical and kinetic and potential
                     energies.




                                                                                                                                   ( 10 points ).












* Activity 2.23   :   Roller coaster simulator.                                         ( 11/29/17   Wednesday )



    2.23.a        Roller coaster. Work out potential and kinetic energies.



- Check this simulator on a roller coaster and explain whats happening at the different most 
important spots on it.  Draw the path the car follows and write down the car’s biggest and smallest speed and say in which place or spot on its way the car gets them.






                                                                                                                                ( 5 points ).





     2.23.b        Come up with a situation, like a roller coaster or you riding a bike on a hill, in
                       which you indicate your mass, the hight, and then work out kinetic, potential and 
                       mechanical energies.



                                                                                                                                ( 10 points ).






      2.23.c     At the following LINK check what Mechanical energy is and what it has to do
                     with potential and kinetic energy. 
                     Open a google doc file and explain there what mechanical energy is and explain
                     also what relationship is established among mechanical and kinetic and potential
                     energies.




                                                                                                                                   ( 10 points ).










* Activity 2.24   :   Mechanical energy important statements.            ( 11/30/17   Thursday )




    2.24.a        Check this LINK and answer the following questions about mechanical
                      energy


 
                     1.  What is the mechanical energy?.

                     2.  What do kinetic energy and potential energy have to do with mechanical
                          energy?.

                     3. What does law of conservation of energy say?.

                     4. Can mechanical energy be destroyed?.
                         What can it be converted to?.

                     5. What the mechanical energy of an object is associated with?.

                     6. Do heat and mechanical energy have some kind of connection?
                         Which one?.

                     7. The job of a hydroelectric plant is to make electrical from the mechanical
                         energy.  How and from what kind of matter stored in dams?.

                     8. If an object contains mechanical energy, What ability does it have to?.

                     9. Every object that has motion has mechanical energy. Is it true?
                         Why?.

                   10. Every object that has a high position but does not move, cannot show
                         mechanical energy. But every object in the same situation but in motion, 
                         does show mechanical energy.  WHY?  Why only objects in motion can show
                         mechanical energy?.


                         


                                                                                                                                     ( 10 points ).






2.24.b     At the following LINK check what Mechanical energy is and what it has to do
                     with potential and kinetic energy. 
                     Open a google doc file and explain there what mechanical energy is and explain
                     also what relationship is established among mechanical and kinetic and potential
                     energies.




                                                                                                                                   ( 10 points ).







* Activity 2.25 : Catapult involves kinetic, potential and mechanical energies.    ( 12/1/17   Friday )



  2.25.a        Build a catapult like this following your teacher’s instructions.
                    After that, answer the questions you see below about this mechanical device.



                                                                          CATAPULT


                    Questions to be answered :

   
                     1)  How does the catapult work?.

                     2)  Where does the force and energy come from to make it work?.

                     3)  What kind of energy is transferred to?.

                     4)  Draw an outline and explain how you did it.


                                                                                                                                  ( 25 points ).







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