Question: An ant walks along a tight thread that is oriented north to south and can be taken to coincide with the (y) axis. The ant

An ant walks along a tight thread that is oriented north to south and can be taken to coincide with the $y$ axis. The ant walks $7 \mathrm{~cm}$ south, then turns and walks $2 \mathrm{~cm}$ north. It continues another $10 \mathrm{~cm}$ north, then $3 \mathrm{~cm}$ south, then $12 \mathrm{~cm}$ north, then $6 \mathrm{~cm}$ south. What is the $y$ component of the ant's displacement in $\mathrm{cm}$ ? Take the origin to be the ant's starting point.

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