How Much Fuel Does a Spacecraft Use to Generate 1.5 MN Thrust?

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To calculate the fuel consumption rate for a spacecraft generating 1.5 MN of thrust with an exhaust speed of 2.5 km/s, one can use the thrust equation, which relates thrust to mass flow rate and exhaust velocity. The mass flow rate can be derived from the formula: thrust equals mass flow rate multiplied by exhaust velocity. By rearranging this equation, the fuel consumption rate can be calculated as the thrust divided by the exhaust speed. The discussion emphasizes the importance of understanding the relationship between thrust and exhaust velocity to solve the problem effectively. Engaging with the problem's fundamentals is crucial for finding the solution.
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A spacecraft ’s motors provide a total thrust of 1.5 MN. If the exhaust speed is 2.5 km/s, at what rate is fuel being used?

Homework Statement


Thrust = 1.5 MN
Exhaust speed = 2.5 km/s

rate fuel being used = ?
 
Last edited:
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How do you think you should start?
What does the information you're given (thrust and velocity) tell you about the situation?
Are there any helpful values you might be able to calculate?
 
i don noe.. pls help me..
 
That's what I'm trying to do. The PF Forum rules require that you try to start the problem. What are you having trouble understanding?
 
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