The stress across a surface element (yellow disk) is the force that the material on one side (top ball) exerts on the material on the other side (bottom ball), divided by the area of the surface.
Overview. The WR450F retails for $8,290, making it the sixth-most expensive 450cc 4-stroke enduro bike of 2013. It comes equipped with a 449cc engine, which is slightly larger than average for a 4-stroke motor.he WR450F retails for $8,290, making it the sixth-most expensive 450cc 4-stroke enduro bike of 2013.
The Bowflex M3 is the most affordable in the new Max Trainer product line. It uses the same technology as the higher-rated premium model, the M5, but they trimmed some of the bells and whistles to get the price down to $999.