Answer:
[tex]0.916v_{ex}[/tex]
Explanation:
A multistage rock is also known as a step rocket and it is a form of vehicle that can use more than a rocket stage. The rocket stage typically contains propellant as well as its engine. The final speed of the rocket can be estimated using the equation below:
[tex]v = v_{ex} ln(\frac{m_{o}}{0.4m_{o}})[/tex] [tex]= v_{ex}*ln(2.5) = v_{ex}*0.916 = 0.916v_{ex}[/tex]
Therefore, the maximum speed of the rocket is [tex]0.916v_{ex}[/tex]
