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The wagon-wheel effect (alternatively called stagecoach-wheel effect) is an optical illusion in which a spoked wheel appears to rotate differently from its true rotation. The wheel can appear to rotate more slowly than the true rotation, it can appear stationary, or it can appear to rotate in the opposite direction from the true rotation ...
It accounts for the "wagon-wheel effect", so-called because in video, spoked wheels (such as on horse-drawn wagons) sometimes appear to be turning backwards. A strobe fountain, a stream of water droplets falling at regular intervals lit with a strobe light , is an example of the stroboscopic effect being applied to a cyclic motion that is not ...
A roller coaster inversion is a roller coaster element in which the track turns riders upside-down and then returns them to an upright position. Early forms of inversions were circular in nature and date back to 1848 on the Centrifugal railway in Paris.
The vertical loop on Full Throttle is one of the world's tallest and largest at 160 feet (49 m) A vertical loop is one of the earliest and most common roller coaster inversions in existence. It is a continuous, upward-sloping section of track that eventually completes a 360-degree turn, inverting riders halfway into the element.
Wheels can also lose traction when surface conditions reduce available traction such as on snow and ice. As an open differential delivers only enough torque to cause the "weakest" wheel to spin, if one drive wheel is stationary on a low traction surface (mud, ice, etc.), the deliverable torque is limited to the traction available on it.
Footage captures the moment fairgoers in Florida were stuck upside-down on a Ferris wheel ride that malfunctioned. The attraction, which features enclosed carriages that swing and flip, slowed ...
The two rails that control the spin of the seats, known as "X Rails", vary in height relative to the track, and spin the train using a rack and pinion gear mechanism. [ citation needed ] The first installation, X, [ 1 ] [ 2 ] was a prototype and cost Arrow Dynamics and Six Flags itself a lot of money due to technical difficulties and design flaws.
Penguin books in Australia recently had to reprint 7,000 copies of a now-collectible book because one of the recipes called for "salt and freshly ground black people." 9 misprints that are worth a ...