Frequency - Word Form
  49 or
  48 if
  48 when
  47 an
  44 one
  43 motion
  41 been
  40 other
  38 velocity
  37 into
  37 was
  36 quantity
  34 i
  34 must
  33 chemical
  33 forces
  33 so
  32 natural
  31 produced
  30 only
  30 same
  30 they
  29 also
  28 power
  27 moving
  27 such
  26 arm
  26 mechanical
  26 our
  26 these
  26 us
  25 oxygen
  25 through
  24 any
  24 friction
  24 his
  24 steam
  24 their
  24 them
  24 thus
  23 law
  23 may
  22 four
  21 b
  21 carbon
  21 no
  21 now