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Menzar شراء في حي المطرية
شراء Menzar
Menzar

Menzar

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وصف
The wheel is a device that enables efficient movement of an object across a surface where there is a force pressing the object to the surface. Common examples are a cart pulled by a horse, and the rollers on an aircraft flap mechanism. Wheels are used in conjunction with axles, either the wheel turns on the axle, or the axle turns in the object body. The mechanics are the same in either case. The low resistance to motion (compared to dragging) is explained as follows (refer to friction): the normal force at the sliding interface is the same. the sliding distance is reduced for a given distance of travel. the coefficient of friction at the interface is usually lower.
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