Resultant force vector addition requires diagram details

Steps:

• Identify current resultant: 6 N to the right from three forces.
• Define desired resultant: 3 N to the left.
• Calculate required additional force: new resultant = current resultant + additional force, so additional force = -3 N - 6 N = -9 N (9 N left, assuming horizontal).
• Compare to options: none match 9 N left.

Not enough information: Diagram not provided, so force directions/magnitudes ambiguous; cannot confirm if all horizontal or vector components needed.

Why B is correct: Not applicable without diagram; stated as correct but calculation shows mismatch.

Why the others are wrong:

• A: 3 N left yields -3 N + 6 N = 3 N right, not 3 N left.
• C: 2 N left yields -2 N + 6 N = 4 N right, not 3 N left.
• D: 13 N right yields 13 N + 6 N = 19 N right, not 3 N left.

Final answer: Not enough information.