Thank you, I understand why vxi and vxy are the same, and vyi=0 and vyf changes due to ay. I do not understand why the resultant vector doesn't have θ calculated as the angle made by the electron hitting the bottom plate. I found θ = tan-1 (1.7x106 /4x106 ) = 23°. Is this a misunderstanding and it should be 90°? I also don't understand where 2vxvycosθ came from?

Thank you, I understand why vxi and vxy are the same, and vyi=0 and vyf changes due to ay. I do not understand why the resultant vector doesn't have θ calculated as the angle made by the electron hitting the bottom plate. I found θ = tan-1 (1.7x106 /4x106 ) = 23°. Is this a misunderstanding and it should be 90°? I also don't understand where 2vxvycosθ came from?

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Thank you, I understand why v_xiand v_xy are the same, and v_yi=0 and v_yfchanges due to a_y_. I do not understand why the resultant vector doesn't have θ calculated as the angle made by the electron hitting the bottom plate. I found θ = tan^-1 (1.7x10⁶ /4x10⁶ ) = 23°. Is this a misunderstanding and it should be 90°?

I also don't understand where 2v_xv_ycosθ came from?