Calculate Force for Constant Velocity: Force & Velocity Problem

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To calculate the other force acting on a particle moving at a constant velocity of v = (3 m/s) i - (4 m/s) j, one must apply Newton's first law, which states that the net force acting on an object in constant motion is zero. Given the first force F1 = (4 N) i + (-9 N) j, the second force must be equal in magnitude and opposite in direction to maintain constant velocity. The discussion highlights confusion about relating force and velocity, emphasizing the need for clarity on Newton's principles. Ultimately, understanding that the net force is zero is crucial for solving this problem. The conversation reflects a common challenge in applying theoretical concepts to practical problems in physics.
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While two forces act on it, a particle is to move at the constant velocity v = (3 m/s) i - (4 m/s) j. One of the forces is F1 = (4 N) i + (- 9 N) j. What is the other force?



2. Homework Equations : Unsure



The Attempt at a Solution



- I know this is an easy problem, but I have one problem with it. I'm not sure how to relate force and velocity. So I'm not even sure where to start. Any hints to point me in the right direction would be great.
 
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What does Newton say about particles moving at constant velocity?
 
PhanthomJay said:
What does Newton say about particles moving at constant velocity?

- I figured I was just thinking too much about that problem. Thanks.
 
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