Three Forces F₁,F₂ and F₃ act on an Object

question 99

Multiple Choice

Three forces F₁,F₂ and F₃ act on an object.If F₁ = 3N i + 5N j + 7N k,F₂ = -5N i - 2N j -2N k,and the object is moving at constant velocity then the vector force F₃ is

• A)-2N i - 3N j - 5N k
• B)2N i - 3N j - 5N k
• C)2N i + 3N j - 5N k
• D)-8N i - 7N j - 9N k
• E)8N i + 7 N j +9N k

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