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Two dimensional projectile question-Check answers and help

  1. Oct 3, 2011 #1
    1. The problem statement, all variables and given/known data[/b]

    An aircraft launches a bomb. The plane is playing upward at an angle of 55 degrees to the horizon. When the bomb is launched, the plane has a speed of 745 km/h. at the time of aluch, the bomb is 8750 m above the ground.

    -how long does it take the bomb to reach its highest point
    -how high does the bomb go from where it was launched
    -how much time until it hits the ground
    -how far horizontally does it travel

    2. Relevant equations[/b]

    The kinematic equations


    3. The attempt at a solution[/b]

    1.) convert 745km/hr to 207m/s

    cos(55)=vx/207m/s, 119m/s=vx

    sin(55)=vy/207m/s, 170m/s=vy

    Δv=at, t=17s

    2) I have no clue how to do

    maybe y vy-1/2gt^2

    3) No idea how to approach

    4) d=vt

    7497m
     
  2. jcsd
  3. Oct 4, 2011 #2

    vela

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    I think you did this right, but it would help if you showed all your work. What are you using for the acceleration of gravity?
    Sounds good, but make sure you get the equation right.
    What does "hit the ground" translate into mathematically?
    Where did this number come from?
     
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