Which of the following is NOT a leaf in the tree below? 
Definitions:
Centripetal Loading
The force acting on a body moving in a circular path directed towards the center around which the body is moving.
Shear Loading
A condition where a material or structure is subjected to forces that cause sliding failure along a parallel plane to the forces applied.
Taper Pin
A pin that has a gradual decrease in diameter from one end to the other, used to locate or hold parts together.
Straight Pin
A fastener or guide that is long in relation to its diameter, utilized in various mechanical or construction applications.
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