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Projectile problem

  1. Jan 15, 2015 #1
    you launch a projectile with an initial velocity of at an angle of 30 degrees and it hits a target .4 secpmds after it is launched at a horizontal distance of .4m
    a. what is the y coordinate of the target
    b. what was its intial velocity
    c.what is the y- components of it s velocity just before it impacts the target
    d. and what is its velocity magnitude and direction just before it impacts the target.

    what i did:
    1. drew graph
    2. vy^2+2ay(y-y0) to find initial velocity
    vy0= 2.8 m/s
    3. find time
    with vy=vy0+at
    0-2.8/-9.8=.285 seconds
    4. y coordinate:
    y=voy+1/2at^2
    .399


    idk how to find the others... please help me.
     
  2. jcsd
  3. Jan 15, 2015 #2

    haruspex

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    I suggest parking this one until we've dealt with the other similar problem you just posted. Then you can use this one to see if you've learnt how to do them.
     
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