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2. Rolling resistance - Wikipedia

   en.wikipedia.org/wiki/Rolling_resistance

   Figure 1 Hard wheel rolling on and deforming a soft surface, resulting in the reaction force R from the surface having a component that opposes the motion. (W is some vertical load on the axle, F is some towing force applied to the axle, r is the wheel radius, and both friction with the ground and friction at the axle are assumed to be negligible and so are not shown.

3. Wheelchair - Wikipedia

   en.wikipedia.org/wiki/Wheelchair

   The rear wheels of self-propelled wheelchairs typically range from 20–24 in (510–610 mm) in diameter, and commonly resemble bicycle wheels. Wheels are rubber-tired and may be solid, pneumatic or gel-filled.

4. Airless tire - Wikipedia

   en.wikipedia.org/wiki/Airless_tire

   12-16.5 Mk1 Croc Tyre with rim center fitted. Airless tires, non-pneumatic tires (NPT), or flat-free tires are tires that are not supported by air pressure. [1] [2] [3] They can be used on small vehicles such as ride-on lawn mowers and motorized golf carts.

5. Woman Paralyzed by Falling Tree Can Move Again Thanks to ...

   www.aol.com/woman-paralyzed-falling-tree-move...

   Related: Teen Becomes Temporarily Paralyzed After 2 Insect Bites: 'Something Was Very Wrong' As Owen explained: “It [used to] take me 30 minutes to get dressed. Now it takes 12. [I used to ...

6. Feds are moving to improve airline travel for people with ...

   www.aol.com/rule-dot-2025-seeks-improve...

   It also outlines steps airlines must take if they damage or misplace a passenger's wheelchair — all in an effort to make the skies friendlier for the roughly 5.5 million Americans use a wheelchair.

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   Get breaking news and the latest headlines on business, entertainment, politics, world news, tech, sports, videos and much more from AOL