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The London Eye first turned on December 31, 1999 to celebrate the new millennium. It was intended to be a temporary attraction, but its popularity soon made it a permanent and iconic part of the London skyline. Each passenger capsule represents one of the 32 London boroughs. The diameter of its wheel is 120 m (394 ft). Each of the ovoidal capsules weighs 11 tons and can carry 25 people. The wheel completes one revolution in 30 minutes - this slow rotation rate means that it not have to stop to take on passengers, i.e., passengers can easily walk on and off the moving capsules at ground level.
To keep the floor of the capsules level, a series of electric motors rotates each capsule at a constant angular velocity, Wcop. Otherwise, the floor of the capsule would not remain level, as shown in the first figure below which would be uncomfortable and dangerous for passengers. Wwheel шсар Wwheel Determine the the angular velocity (in vector form) at which the electric motors rotate the capsule in terms of Wwheel.