(self, frame)
return self._vel_dict[frame]
The velocity Vector of this Point in the ReferenceFrame.

        Parameters
        ==========

        frame : ReferenceFrame
            The frame in which the returned velocity vector will be defined in

        Examples
        ========

        >>> from sympy.physics.vector import Point, ReferenceFrame
        >>> N = ReferenceFrame('N')
        >>> p1 = Point('p1')
        >>> p1.set_vel(N, 10 * N.x)
        >>> p1.vel(N)
        10*N.x
The velocity Vector of this Point in the ReferenceFrame.
The velocity Vector of this Point in the ReferenceFrame .
def vel(self, frame):
        """The velocity Vector of this Point in the ReferenceFrame.

        Parameters
        ==========

        frame : ReferenceFrame
            The frame in which the returned velocity vector will be defined in

        Examples
        ========

        >>> from sympy.physics.vector import Point, ReferenceFrame
        >>> N = ReferenceFrame('N')
        >>> p1 = Point('p1')
        >>> p1.set_vel(N, 10 * N.x)
        >>> p1.vel(N)
        10*N.x

        """

        _check_frame(frame)
        if not (frame in self._vel_dict):
            raise ValueError('Velocity of point ' + self.name + ' has not been'
                             ' defined in ReferenceFrame ' + frame.name)
        return self._vel_dict[frame]
def vel ( self , frame ) : _check_frame ( frame ) if not ( frame in self . _vel_dict ) : raise ValueError ( 'Velocity of point ' + self . name + ' has not been' ' defined in ReferenceFrame ' + frame . name ) return self . _vel_dict [ frame ]