2D Motion Homework Help

[cjt100]

At t = 0, a particle leaves the origin with a velocity of 18.7 m/s in the positive x direction and moves in the xy plane with a constant acceleration of (-1 i + 4 j) m/s². At the instant the y coordinate of the particle is 18 m, what is the x coordinate of the particle?

[FizziksGuy]

Hi cjt100.  So we can better assist, can you tell us what you've tried so far, and where you're getting stuck?