Page 13 - TYPES OF FORCES (FRICTIONAL , GRAVITATIONAL, MAGNETIC AND BOUYANT FORCES)
P. 13

5. GRAVITY:
                  5  .    G   R   A   VI     T   Y  :






                                                                          a
                                                 e
                                                                e
                                            th
                                                                            t
                                                                     t
                                                      f
                            v
                    Gra
                                                                       h
                              ity

                                                           rc
                                       is
                  • •Gravity is the force that

                                                        o
                  attracts objects to the centre of
                  a  tt  ra   c  ts    o  b  j ec   ts    t  o   th   e    c en    t re     o f
                  th   e    ea   rth    .
                  the earth.
                                                         it
                            a
                                                       v
                                           f
                                   e
                                        o

                               us
                                                  ra
                                               g

                                                                              f
                                                                           l
                                                                     n
                                                                        a

                  • •Because of gravitational force,
                                                                                        e,
                                                                                o
                                                                                   rc
                    Bec
                                                             a
                                                               tio
                                                                              e

                                         l
                                      b
                                                             y
                                                        ta
                                           e

                                                                         th
                                                  o

                                                                     n
                                                                  o
                                               t
                                                      s
                  w
                                    a
                          a
                     e
                  we are able to stay on the
                             re
                  ground.
                  gro    un   d  .
                                                                                 e
                                                         h
                                                      w
                                                                      er
                                               e,
                  • • For example, whenever we
                                e
                                              l
                           r
                                                            en
                                                                 ev
                         o
                                        m

                                  xa
                                           p
                      F
                                                                             w
                                                                          up
                            w
                                                            s
                                                              to
                       ro
                                                                   n
                                                       a
                                                                     e

                                         a
                                                                                       th
                                 a

                                             l
                                           l

                                                                                 in


                                      b
                                                                                            e
                                                   r
                  th
                  throw a ball or a stone up in the

                                                o
                                                                 o
                                                                                            d

                                                                                       un
                                                                          e
                                                                        h
                  air, it comes back to the ground
                  a
                     ir,

                                                                     t
                                                                               gro
                                                     a
                                                          k
                                  c

                                                  b
                                                       c

                                           es
                                                               t
                                     o
                                       m
                            it
                  a
                                                     e.
                                                                          c
                                                                             c
                  after some time. This occurs
                                   o
                                         e
                                     m

                                s
                                              tim
                                                                               urs
                                                            T

                       te

                     f
                                                                  is
                                                               h
                                                                        o
                            r

                                                                                                e
                                                                                      f

                     ec
                                                                                        o
                                                                                           rc
                                                               v
                                      o
                                                                 it
                                         f
                                                                                  l
                                                  e
                                                       gra
                                                                             n
                  b
                  because of the gravitational force
                                                                       tio

                                             th
                                                                    a
                                                                                a
                             us
                                 e
                          a
                  of the earth or gravity.
                  o  f   th   e    ea   rt   h    o r   gra     v it  y  .
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