Find Velocity with only range given.

[Jimkatz809]

Homework Statement

For the intercontinental ballistic missile to
have a range of 16000 km, what must be
the speed v0 of the missile at the end of the
accelaration phase? Take the distance of the
accelaration phase, called the boost time, as
negligible compared to the travel time.
Answer in units of km/s.

Homework Equations

The Attempt at a Solution

 

[lewando]

The problem needs another constraint, like maximum height or launch angle for it to have a singular v0 solution. Double check the problem statement, pick some relevant equations, and show us where you are getting stuck.