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2. Contortion - Wikipedia

   en.wikipedia.org/wiki/Contortion

   However, as long as the joint socket is the right shape, most extreme bends can be achieved without dislocating the joint. [4] Actual dislocations [ 5 ] are rarely used during athletic contortion acts since they make the joint more unstable and prone to injury, and a dislocated limb cannot lift itself or support any weight.

3. Dual ball joint suspension - Wikipedia

   en.wikipedia.org/wiki/Dual_ball_joint_suspension

   The two arms, the spindle, and the body, form a four-bar link.Use of the linkage at the lower suspension connection of either a MacPherson strut or a short long arms suspension readily gives an effective virtual ball joint outboard of the spindle, which is very useful for a suspension designer, allowing negative scrub radius whilst allowing the ball joints to move in and thus out of the way of ...

4. Screwball Scramble - Wikipedia

   en.wikipedia.org/wiki/Screwball_Scramble

   If successful, the ball will roll off the end of the rods and onto the unstable table. The unstable table is a flat table with a border around it and various pegs in the middle; the player must tilt this table with a lever in order to get the ball onto a ramp at the end, and avoid falling off at a false opening in the border.

5. The 8 Smartest Knee Exercises to Help Keep Your Joints Pain-free

   www.aol.com/lifestyle/8-smartest-knee-exercises...

   The 8 Smartest Knee Exercises to Help Keep Your Joints Pain-free. Adrienne Jordon, Lulu Chang ... Do 20 kicks on each side alternating for two rounds, take a 30 to 45s rest in between sets ...

6. Aerobatic maneuver - Wikipedia

   en.wikipedia.org/wiki/Aerobatic_maneuver

   Immelmann; Immelmann turn; Roll-off-the-top; half loop, half roll 1/2 looping up followed by half a roll. There should be no pause between the end of the looping section and the start of the roll to erect flight. Split S: Essentially an Immelmann in reverse. Half roll (from erect to inverted) followed by positive pitch to give a half loop ...

7. Revolute joint - Wikipedia

   en.wikipedia.org/wiki/Revolute_joint

   A revolute joint (also called pin joint or hinge joint) is a one-degree-of-freedom kinematic pair used frequently in mechanisms and machines. [1] The joint constrains the motion of two bodies to pure rotation along a common axis. The joint does not allow translation, or sliding linear motion, a constraint not shown in the diagram. Almost all ...

8. Six degrees of freedom - Wikipedia

   en.wikipedia.org/wiki/Six_degrees_of_freedom

   Six degrees of freedom also refers to movement in video game-play. First-person shooter (FPS) games generally provide five degrees of freedom: forwards/backwards, slide left/right, up/down (jump/crouch/lie), yaw (turn left/right), and pitch (look up/down). If the game allows leaning control, then some consider it a sixth DOF; however, this may ...

9. Plate rolling machine - Wikipedia

   en.wikipedia.org/wiki/Plate_rolling_machine

   The pinching roll holds the plate. Three-roller machines (variable pitch aka variable geometry) have one pressing top roll and two pressing side rolls. The three-roll variable pitch works by having all three rolls able to move and tilt. The top roll moves in the vertical plane and the side rolls move on the horizontal plane. When rolling, the ...