Solving for Velocity of Particle in 2D Plane

AI Thread Summary
Two forces act on a 1.70 kg particle initially at rest, with known forces F1 and F2. The calculated velocity components at 9.4 seconds are (38.7i - 49.7647j) m/s, and the direction is 307.87 degrees. The discussion emphasizes using standard constant acceleration equations rather than relying on final velocity for calculations. The importance of incorporating the initial position in the calculations is also highlighted. Correct application of these principles leads to accurate results in determining the particle's motion.
PeterFer
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Homework Statement



Two forces, vector F 1 = (3 i - 2 j) N and vector F 2 = (4 i - 7 j) N, act on a particle of mass 1.70 kg that is initially at rest at coordinates (-1.70 m, +4.25 m).

i know that the components of the velocity at 9.4 seconds are (38.7i - 49.7647j)m/s
i also know that the direction the particle is moving at 9.4 seconds is 307.87 degrees

Homework Equations





The Attempt at a Solution


some how everything I do brings me to (363.78i - 467.788j)m which is wrong
 
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Welcome to PF!

Hi PeterFer! Welcome to PF! :smile:

You don't need, and shouldn't use, the final velocity …

(it's misled you into using s = vt)

just use one of the standard constant acceleration equations

(and don't forget to add on the initial position). :wink:
 


ah yea thank you, i ended up realizing that myself but thank you anyway
 
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