Answer:
The thrust is
![6* 10^6\ N](https://img.qammunity.org/2021/formulas/physics/high-school/erl8f6dfr3jicesct0st2qq4nzwyxmnz5u.png)
Step-by-step explanation:
Given that,
Mass of gas,
![m=1.5* 10^3\ kg](https://img.qammunity.org/2021/formulas/physics/high-school/ao6wxws76yjc6a9wowtwqdsoarpr9g7eze.png)
The rate at which the gas is expelling,
![(dv)/(dt)=4* 10^(3)\ m/s](https://img.qammunity.org/2021/formulas/physics/high-school/5e3yf5hwq42ci2tntp2od1rp7ss9sb9adx.png)
We need to find the thrust produced by the gas.
We know that force is equal to the rate of change of momentum. So,
![F=(p)/(t)](https://img.qammunity.org/2021/formulas/physics/high-school/opgr4zbnohxvmtt7603ybwh4w7smpb2qd3.png)
Also, p = mv
![F=(mv)/(t)](https://img.qammunity.org/2021/formulas/physics/high-school/rk2eldjyfvf64a08k5k4lmhjnkzju1hqgu.png)
So,
![F=1.5* 10^3* 4* 10^3\\\\F=6* 10^6\ N](https://img.qammunity.org/2021/formulas/physics/high-school/wvs6eghkng0ygfsvmmfomuimr4vy7brhss.png)
So, the thrust is
![6* 10^6\ N](https://img.qammunity.org/2021/formulas/physics/high-school/erl8f6dfr3jicesct0st2qq4nzwyxmnz5u.png)