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’s 3000 N force resists the tugboat’s pull, so the tugboat must pull harder than 3000 N to move it toward the harbor. A 4500 N force in the same direction as the barge’s motion can overcome that resistance. A force of 3000 N would only balance the opposing force, while pulling in the opposite direction would not help.

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