Given a burn time of 4 seconds for a J200 motor, what is its total impulse?

Study for the Tripoli Rocketry Association TMP Test. Access flashcards and multiple choice questions, each with hints and explanations. Prepare effectively for your exam!

The total impulse of a rocket motor is calculated using the formula:

Total Impulse (I) = Thrust (F) × Burn Time (t)

In the case of a J200 motor, it generates a thrust of 200 Newtons and has a burn time of 4 seconds. Applying the values to the formula:

Total Impulse = 200 Newtons × 4 seconds = 800 Newton-seconds.

This computation demonstrates that the total impulse produced by the motor during its burn time is indeed 800 Newton-seconds. This amount represents the total momentum change imparted by the motor and is critical for understanding the performance characteristics of the rocket.

Other options will not match the correct total impulse calculation. For instance, the options that propose values lower than 800 Newton-seconds fail to account for the thrust and burn time combination correctly, while the offering of 800 Newtons misrepresents the measurement unit, as total impulse should be in Newton-seconds, not just Newtons.

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