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A Packing Crate Rests on a Horizontal Surface

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A packing crate rests on a horizontal surface.It is acted on by three horizontal forces: 600 N to the left,200 N to the right,and friction.The weight of the crate is 400 N.If the 600-N force is removed,the resultant force acting on the crate is


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Inverted U-Curve

A graphical representation showing a relationship where performance or effectiveness increases with stress or arousal up to an optimal point, beyond which further increases in stress lead to a decline in performance.

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