A 9960 lb rocket is launched straight up, starting at rest.The thrust force push

Question

A 9960 lb rocket is launched straight up, starting at rest.The thrust force pushing the rocket upward is 20000 lb. Airresistance exerts a force of 4000 lb (assumed constant). Considerthe point at which the rocket is 5.0 miles up.
A) What is the rocket’s initial mechanical energy (atlaunch)? B) What work does the thrust do? C) What work does air resistance do? D) What is the rocket’s final mechanical energy (when itis 5.0 miles up)? E) What is the rocket’s speed when it is 5.0 milesup? A 9960 lb rocket is launched straight up, starting at rest.The thrust force pushing the rocket upward is 20000 lb. Airresistance exerts a force of 4000 lb (assumed constant). Considerthe point at which the rocket is 5.0 miles up.
A) What is the rocket’s initial mechanical energy (atlaunch)? B) What work does the thrust do? C) What work does air resistance do? D) What is the rocket’s final mechanical energy (when itis 5.0 miles up)? E) What is the rocket’s speed when it is 5.0 milesup?

Explanation / Answer

anyone have some hints at least?

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