model rocket is launched straight upward with an initial speed of 50.0 m/s. It accelerates with a constant upward acceleration of 1.00 m/s2 until its engines stop at an altitude of 130 m.

Question

model rocket is launched straight upward with an initial speed of 50.0 m/s. It accelerates with a constant upward acceleration of 1.00 m/s2 until its engines stop at an altitude of 130 m.
(a) What is the maximum height reached by the rocket? 
  m

(b) How long after lift-off does the rocket reach its maximum height? 
  s

(c) How long is the rocket in the air?
  s

drwls · Answer

Follow the approach outlined in this similar question of a few days ago: http://www.jiskha.com/display.cgi?id=1283656710

Bill · Answer

A certain car is capable of accelerating at a rate of +0.60 m/s2. How long does it take for this car to go from a speed of 20 mi/h to a speed of 65 mi/h?

Johnny · Answer

idk whats the answer