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Homework Help: Finding Component Constants

  1. Sep 14, 2008 #1
    A rocket is fired at an angle from the top of a tower of height 50.0m. Because of the designs of its engines, its position coordinates are of the form x(t)=A+Bt^2 and y(t)=C+Dt^3, where A, B, C, and D are constants. The acceleration of the rocket after 1.00s after firing is a= (4.00i+3.00j)m/s^2. Find the constants A, B, C, and D including their SI units.

    I took the derivative of the position vectors twice to get the acceleration vector and plugged in 1.00s into t to find D=0.500m/s^3 and B=2.00m/s^2. I am stuck on where to go after that to get A and C.
  2. jcsd
  3. Sep 14, 2008 #2


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    What is C. Wasn't it given to you? What is A then? Remember the equation describes position. Where was its initial position?
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