4ESO Física i Química : ARTICLE 124 : Forces lesson exam exemple 1.

             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 :

    > Parallel forces exercise with same sense.

   >  Parallel forces exercise with different sense.

  -  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.

  > VIDEO WITH PROBLEM’S SOLUTION.