Physics

particle A moves along the line y = 30m with a constant velocity of magnitude 3.5 m/s and parallel to the x axis. At the instant particle A passes the y axis, particle B leaves the origin with 0 initial speed and constant acceleration of magnitude 0.50 m/s2. What angle θ between and the positive direction of the y axis would result in a collision

i have tired everything i know you have to use the cosine and sin law but stil cant work it out

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  1. tried everything?

    They have the same final (x,y) position
    xfa=xfb
    3.5t=1/2*.5*t^2,
    tf= 14 sec
    They have the same final y
    yfa=30=yfb

    But particle B started at the origin.
    Theta between y axis and line
    TanTheta=xchange/ychange=(3.5*14)/30

    solve for Theta.

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    bobpursley
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