Cycloid plates of golden age violins are closely modeled by curtate cycloid curves. Later work indicates that curtate cycloids do not serve as general models for these curves, which vary considerably. Cycloid A cycloid is the curve traced by a point on the rim of a circular wheel as the wheel rolls along a straight line without slipping. A cycloid is a specific form of trochoid and is an example of a roulette, a curve generated by a curve rolling on another curve. The cycloid, with the cusps pointing upward, is the curve of fastest descent under constant gravity, and is
Diary of a Wimpy Kid: The Third Wheel Diary of a Wimpy Kid: The Third Wheel Diary of a Wimpy Kid: The Third Wheel is a 2012 bestselling children's novel and the seventh book in the Diary of a Wimpy Kid series, written by American author Jeff Kinney. Kinney announced the book in March 2012, with "The Third Wheel"s cover revealed in May 2012. The book was released on November 13, 2012. Greg recalls several anecdotes from the time of his conception to his preschool years, notable ones include how his mother read to him before bed, how his parents’ excessive kissing supposedly led to his premature birth,