You launch a model rocket from ground level. it moves directly upward with a constant acceleration of 80.5 m/s2 for 1.40 seconds, at which point it runs out of fuel. assuming air resistance on the rocket is negligible, what is the maximum altitude (above the ground) achieved by the rocket

If the rocket starts at rest, then

Then in the 1.40 seconds during its initial ascent, the displacement over this period is given by

Once fuel runs out, the only force acting on the rocket is that due to gravity, so the rocket's acceleration drops to a constant . The rocket's displacement is then captured by

You can find the maximum displacement from here by completing the square:

This tells you that a maximum displacement/altitude of about is achieved by the rocket at .

the answer to this question is 60 n

there is no correct list among the choices you've provided.

the list might look something like this:

-- baby human

-- piccolo

-- flute

-- soprano singer

-- trumpet

-- tenor singer

-- trombone

-- baritone singer

-- baritone horn

-- bass singer

-- tuba

since i had to make up the list myself, i made it easy on myself, and i didn't try to shuffle the string instruments and woodwinds into it too.