Page 37 - Force 10
P. 37

NUMERICAL INVOLVING UNIVERSAL LAW






       EXAMPLE






         2. Calculate the gravitational force between two masses 30Kg and



                                              10Kg when they are kept 500cm apart.



      Solution : Here,  given , Mass of one body (m ) = 30Kg
                                                                                                                              1
                                                                Mass of another body (m ) = 10Kg
                                                                                                                                  2

                                                               Distance (d) = 500cm = 500/100cm=5m



      Gravitational force(F) = ?


                                                          
                                                    
      We have ,  F=

                                                     

                                                                                                                               -10
                                                                                                        2
                                                                     -11
                                          = (6.67x10 x30x10)/(5 ) = 8x10 N.
                                                                                                                                                      -10
      Thus gravitational force existing between them is 8x10 N.
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