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

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In summary, the rate of fuel being used refers to the amount of fuel consumed over a specific period of time and is calculated by dividing the amount of fuel consumed by the time it took to consume it. Factors such as the type of vehicle, driving habits, road conditions, and maintenance can affect this rate. Monitoring the rate of fuel being used can help in identifying issues with fuel efficiency and managing expenses. To improve the rate of fuel being used, one can practice fuel-efficient driving habits, maintain the vehicle properly, and avoid carrying unnecessary weight.
  • #1
matramlee
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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 = ?
 
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  • #2
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?
 
  • #3
i don noe.. pls help me..
 
  • #4
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?
 
  • #5


I would approach this question by using the equation for thrust generated by a rocket: T = m_dot * ve, where T is the thrust, m_dot is the mass flow rate of fuel, and ve is the exhaust velocity. Rearranging this equation, we can solve for the mass flow rate of fuel: m_dot = T / ve. Plugging in the given values, we get m_dot = 1.5 MN / 2.5 km/s = 600 kg/s. This means that the spacecraft is using 600 kg of fuel every second in order to generate a total thrust of 1.5 MN.
 

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

What is the definition of "rate of fuel being used"?

The rate of fuel being used refers to the amount of fuel that is consumed or used over a specific period of time. It is usually measured in units of volume or weight, such as liters per hour or pounds per hour.

How is the rate of fuel being used calculated?

The rate of fuel being used is calculated by dividing the amount of fuel consumed by the time it took to consume it. For example, if a car used 20 liters of fuel in 2 hours, the rate of fuel being used would be 10 liters per hour.

What factors can affect the rate of fuel being used?

The rate of fuel being used can be affected by various factors such as the type of vehicle, driving habits, road conditions, and maintenance of the vehicle. A well-maintained vehicle with good driving habits can have a lower rate of fuel consumption compared to a poorly maintained vehicle with aggressive driving habits.

What is the significance of monitoring the rate of fuel being used?

Monitoring the rate of fuel being used can help identify any issues with the vehicle's fuel efficiency. It can also help in making adjustments to driving habits or identifying any maintenance needs. Additionally, keeping track of the rate of fuel being used can also help with budgeting and managing fuel expenses.

How can the rate of fuel being used be improved?

The rate of fuel being used can be improved by practicing fuel-efficient driving habits, such as avoiding sudden accelerations and braking, maintaining a steady speed, and reducing idling time. Keeping the vehicle properly maintained, using the recommended grade of fuel, and avoiding carrying unnecessary weight can also help improve the rate of fuel being used.

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