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                                  Thrown

 

               Traviesa was at on top of a car with the height of 6ft. She threw a water balloon at  Morena with the velocity of -10ft/sec But missed. How long will the water balloon take to hit the ground?     

                  h=- 16t 2+ vt + s                             *formula for vertical motion 

                                                                                         motions                   Go to fullsize image

                 0=-16t2

                X=-b±√b2 -4ac                                                                 

                      2a 

             X=-(-10) ±√ (-10)2-4(-16) (5)                                                       

                                    2(-16)

                             X=10±√100+320                         

                                        -32                                        

                               X=10±√420                                 

                                       -32

                    X=10+20.50  = - 0.95 sec

                          -32

                    X=10 - 20.50 = 0.33 sec

                           -32

 

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                                                                 Dropped

 

  

                           Yoly was on a tree trying to take a picture of him with out noticing. She dropped the camera from the height of 15ft. how long will it take to hit the ground?

               h=-16t2+s

               0=-16t2+15

               -15        -15

               -15  = 16t -16    -16                                                                         Go to fullsize image

             √0.94=√t2

                0.97=t