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Question: While two forces act on it, a 10 kg particle is to move at a constant velocity v=(6.8m/s)i +(5.2m/s)j. One of the forces is F1=(4.1N)i +(18.5N)j.

Question 1: What is the j component of the other force?

(in N)

I know the correct answer for above question but explain how to get this answer! Thanks.

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