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.
Plus a host of available options give the Ford F-150 a lot to choose from. Prudent purchasing suggests considering one of the lesser trim levels, such as an XLT or Lariat, since a King Ranch and Platinum can easily top $60,000.In our view, the 2.7-liter twin-turbo is worth the additional cost.hen the F-150 was redesigned for 2015, Ford downplayed the dramatic aluminum body by retaining an angular look and deleting the prior F-150âs curves. The body and cargo bed are made of aluminum panels glued and riveted together.