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Homework Help: Vectors/Projectileshelp please!

  1. Sep 29, 2008 #1
    this is vectors and projectiles...our teacher told us how to do it...and i did exactly what he told us to do, but it isnt right....

    A rocket is launched at an angle of 53° above the horizontal with an initial speed of 75 m/s, as shown in Figure 3-31. It moves for 21 s along its initial line of motion with an acceleration of 21 m/s2. At this time its engines fail and the rocket proceeds to move as a free body.

    (a) What is the rocket's maximum altitude?

    (b) What is the rocket's total time of flight?

    (c) What is the rocket's horizontal range?
    1. The problem statement, all variables and given/known data

    2. Relevant equations

    3. The attempt at a solution
  2. jcsd
  3. Sep 29, 2008 #2
    What work have you done?
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