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The motion of a cart can be represented by x (t) = (-2.5m/s) t – 10.0m. At what time
does this cart cross the origin?
It crosses the origint = 4s after we start observing it
O It crosses the origin t = Os after we start observing it
O If it were moving the same way before we started observing it then it crossed the origin
4 seconds before we started counting.

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