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Angle plus horizontal velocity, please help!

  1. Sep 26, 2007 #1
    if an object is fired at a 20 degree angle and has a horizontal velocity of 30m/s, what is the vertical displacement, how long the ball is in the air, horizontal displacement, original velocity of the ball????
     
  2. jcsd
  3. Sep 26, 2007 #2
  4. Sep 26, 2007 #3

    hotvette

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    You need to show some work. Do you have any relevation equations for projectile motion?
     
  5. Sep 26, 2007 #4
    basic motion - free falling body. range is straight line
     
  6. Sep 27, 2007 #5

    hotvette

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    OK, so what are the applicable equations for basic motion - free falling body and how does that relate to the problem statement?
     
  7. Sep 27, 2007 #6
    if u help me find the initial velocity or time i could find the the problems myself
     
  8. Sep 27, 2007 #7

    hotvette

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    The easiest part is the initial velocity. You are given an angle and the horizontal component of the velocity. Draw a triangle and use some trig.
     
  9. Sep 27, 2007 #8
    okay i can't do t the trig and i have a test tommorow please show me how to do it
     
  10. Sep 27, 2007 #9
    never mind i got it. thanx for reminding me about the trig
     
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