What is the acceleration of a spacecraft during liftoff?

[elleleeanne]

Homework Statement

Within 4 sec of liftoff, a spacecraft that is uniformly accelerating straight upward from rest reaches an altitude of 450 m [up]. What is the spacecraft 's acceleration?

Homework Equations

The five key equations, plus the velocity, speed, and acceleration equations

The Attempt at a Solution

I don't know what the altitude would be (Displacement? Distance?), so I can't solve the equation with the five key equations.

 

[rock.freak667]

Do you know an equation from the key equations that involves displacement+velocty+time+acceleration?

Hint: displacement = ??

 

[elleleeanne]

Thank you so much!