Free Fall/Constant Acceleration Problem

  • Thread starter cheerspens
  • Start date
  • #1
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Homework Statement


A rocket is fired vertically and ascends with a constant vertical acceleration of 20.0 m/s^2 for 2.00 seconds. Its fuel is then used up and it continues as a free object. What is the maximum altitude reached?


Homework Equations


X=Xo+Vot+(1/2)at^2
V=Vo+at
2a(X-Xo)=V^2-Vo^2


The Attempt at a Solution


I don't know how to solve for the point at which the rocket runs out of fuel. Once I can do that I think I will be able to find the maximum altitude reached as it asks in the problem.
 

Answers and Replies

  • #2
Pengwuino
Gold Member
5,009
16
They tell you at what time the rocket runs out of fuel. Use this to determine the height and velocity that the rocket is at when the fuel runs out.
 

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