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  2. Cool Math Games - Wikipedia

    en.wikipedia.org/wiki/Cool_Math_Games

    Cool Math Games (branded as Coolmath Games) [a] is an online web portal that hosts HTML and Flash web browser games targeted at children and young adults. Cool Math Games is operated by Coolmath LLC and first went online in 1997 with the slogan: "Where logic & thinking meets fun & games.".

  3. Cycloid gear - Wikipedia

    en.wikipedia.org/wiki/Cycloid_gear

    A cycloid (as used for the flank shape of a cycloidal gear) is constructed by rolling a rolling circle on a base circle. If the diameter of this rolling circle is chosen to be infinitely large, a straight line is obtained. The resulting cycloid is then called an involute and the gear is called an involute gear. In this respect involute gears ...

  4. Float shifting - Wikipedia

    en.wikipedia.org/wiki/Float_shifting

    Float shifting can reduce clutch wear because it is used so much less (only for starting from a standstill). Conversely, improper engagement of a gear (when the engine and transmission speeds aren't matched) can cause wear on the synchros and lockouts, and damage the gears by physically grinding them together due to a difference in speed.

  5. Roulette (curve) - Wikipedia

    en.wikipedia.org/wiki/Roulette_(curve)

    If the rolling curve is a circle and the fixed curve is a line then the roulette is a trochoid. If, in this case, the point lies on the circle then the roulette is a cycloid . A related concept is a glissette , the curve described by a point attached to a given curve as it slides along two (or more) given curves.

  6. Coin rotation paradox - Wikipedia

    en.wikipedia.org/wiki/Coin_rotation_paradox

    The outer coin makes two rotations rolling once around the inner coin. The path of a single point on the edge of the moving coin is a cardioid.. The coin rotation paradox is the counter-intuitive math problem that, when one coin is rolled around the rim of another coin of equal size, the moving coin completes not one but two full rotations after going all the way around the stationary coin ...

  7. Spirograph - Wikipedia

    en.wikipedia.org/wiki/Spirograph

    Later, the Super-Spirograph introduced additional shapes such as rings, triangles, and straight bars. All edges of each piece have teeth to engage any other piece; smaller gears fit inside the larger rings, but they also can rotate along the rings' outside edge or even around each other. Gears can be combined in many different arrangements.

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  9. Hypocycloid - Wikipedia

    en.wikipedia.org/wiki/Hypocycloid

    total rotations of rolling circle = p - q rotations If k is an irrational number , then the curve never closes, and fills the space between the larger circle and a circle of radius R − 2 r . Each hypocycloid (for any value of r ) is a brachistochrone for the gravitational potential inside a homogeneous sphere of radius R .

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