Post a New Question


posted by .

A model rocket blasts off from the ground, rising straight upward with a constant acceleration that has a magnitude of 91.9 m/s2 for 1.53 seconds, at which point its fuel abruptly runs out. Air resistance has no effect on its flight. What maximum altitude (above the ground) will the rocket reach?

  • physics -

    First calculate the burnout velocity (Vbo) and altitude (Hbo).
    Vbo = a*t = 91.9*1.53 = 140.6 m/s
    Hbo = (a/2)t^2 = 107.6 m
    The additional distance Hco that the rocket coasts upward can be calculated assuming conservation of energy.

    g*Hco = Vbo^2/2
    Hco = 1008.6 m
    Hmax = Hbo + Hco

    Constant rocket mass is being assumed.

Answer This Question

First Name:
School Subject:

Related Questions

More Related Questions

Post a New Question