A body experiencing uniform circular motion requires a centripetal force, towards the axis as shown, to maintain its circular path. In the case of an object that is swinging around on the end of a rope in a horizontal plane, the centripetal force on the object is supplied by the tension of the rope.
The museumâs architect and project designer is the Canadian Douglas Cardinal (Blackfoot); its design architects are GBQC Architects of Philadelphia and architect Johnpaul Jones (Cherokee/Choctaw).
Today, the Castle houses the Institution's administrative offices and the Smithsonian Information Center. Located inside near the north entrance is the crypt of James Smithson, benefactor of the Institution, while outside on the Mall, a bronze statue, executed by William Wetmore Story, honors Joseph Henry.