Rotational stiffness is torque applied over angle
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*Rotational stiffness* is the extent to which an object resists rotational deformation.

**Links:**

#. `Wikipedia <https://en.wikipedia.org/wiki/Stiffness#Rotational_stiffness>`__.

.. py:currentmodule:: symplyphysics.laws.dynamics.deformation.rotational_stiffness_is_torque_over_angle

.. py:data:: rotational_stiffness

    Rotational stiffness of the body. See :attr:`~symplyphysics.symbols.classical_mechanics.torsion_stiffness`.

Symbol:
    :code:`kappa`

Latex:
    :math:`\kappa`

Dimension:
    :code:`force*length/angle`


.. py:data:: torque

    :attr:`~symplyphysics.symbols.classical_mechanics.torque` applied to the body.

Symbol:
    :code:`tau`

Latex:
    :math:`\tau`

Dimension:
    :code:`force*length`


.. py:data:: angular_distance

    Angle of deformation. See :attr:`~symplyphysics.symbols.classical_mechanics.angular_distance`

Symbol:
    :code:`theta`

Latex:
    :math:`\theta`

Dimension:
    :code:`angle`


.. py:data:: law

    :code:`kappa = tau / theta`


    Latex:
        .. math::
            \kappa = \frac{\tau}{\theta}