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 2017 Lexus NX 200t has a starting price of $35,085. You can also get the NX 200t F Sport, which starts at $37,185. The F Sport has a sport suspension, sport seats, and some styling changes, but it's otherwise very similar, so those additions may not be worth the extra money.