A vector diagram is a visual tool used in physics to show forces or other vector quantities, like velocity or acceleration. In a vector diagram, arrows represent vectors. The arrow points in the direction of the vector quantity, and the length of the arrow indicates the magnitude (size) of the vector. Vector diagrams help us understand how these different forces or movements can be combined or balanced. They're useful for figuring out what will happen in a system, like whether an object will move or stay still.
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