Skip to content

Help Zone

Student Question

Secondary I • 1yr.


Hello! Is the movement of a hand on a clock helical or  a rotation? I don’t understand these two movements, can I have examples of the 2 please?

Thank you!

Science
avatar
avatar

{t c="richEditor.description.title"} {t c="richEditor.description.paragraphMenu"} {t c="richEditor.description.inlineMenu"} {t c="richEditor.description.embed"}

Explanations (1)

  • Explanation from Alloprof

    Explanation from Alloprof

    This Explanation was submitted by a member of the Alloprof team.

    Options
    Team Alloprof • 1yr.

    Hello!

    In a clock, the hand makes a circular motion around an axis, but the hand does not move along a fixed axis, as a helical motion does. It then performs a rotational movement.

    As stated previously, an object makes a rotational movement if it performs a circular movement around an axis. A swing makes a rotational movement, since it rotates around its axis, the part that supports its strings.

    Helical motion moves both along and around an axis. A corkscrew is a good example: when the metal spiral enters the cork stopper, it makes both a rotational movement and a translational movement while sinking into the cork!

    Hope this helps your understanding!