4. Space shuttle Alantis is launched from rest at t=0s with a constant acceleration upward. It is at a height of 2100 m at t = 20s.

    A.    (8 points)

    What is the acceleration of Alantis?

    Solution:


     

    B.    (12 points)

            It releases the booster rockets at t=125s, what is the velocity of Alantis at that time (do not forget direction)? How high is Alantis when this occurs?

    Solution: