A tugboat is pulling a barge into a harbor. The barge is exerting a force of 3000 N against the tugboat. Which force would most likely allow the tugboat to move the barge into the harbor?

The barge pushes back on the tugboat with a force of 3000 N. To move the barge toward the harbor, the tugboat must pull harder than that opposing force, so the net force is toward the harbor. A force of 4500 N opposite the barge’s push is greater than 3000 N and can move the barge.

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