If the average thrust of a rocket motor is 100 Newtons and the burn time is 4 seconds, what is the total impulse?

If the average thrust of a rocket motor is 100 Newtons and the burn time is 4 seconds, what is the total impulse?

• A. 200 Newton-seconds
• B. 400 Newton-seconds
• C. 1000 Newton-seconds
• D. 600 Newton-seconds

Answer: (B)

To calculate the total impulse generated by a rocket motor, you can use the formula: Total Impulse = Average Thrust × Burn Time. In this scenario, the average thrust is given as 100 Newtons and the burn time is 4 seconds. Substituting these values into the formula provides: Total Impulse = 100 Newtons × 4 seconds = 400 Newton-seconds. This calculation correctly captures the relationship between thrust, burn time, and the resultant total impulse. The units of Newton-seconds reflect the momentum change imparted by the rocket motor during its operation. Thus, the total impulse calculation showing 400 Newton-seconds is aligned with the parameters provided in the question.

To calculate the total impulse generated by a rocket motor, you can use the formula:

Total Impulse = Average Thrust × Burn Time.

In this scenario, the average thrust is given as 100 Newtons and the burn time is 4 seconds. Substituting these values into the formula provides:

Total Impulse = 100 Newtons × 4 seconds = 400 Newton-seconds.

This calculation correctly captures the relationship between thrust, burn time, and the resultant total impulse. The units of Newton-seconds reflect the momentum change imparted by the rocket motor during its operation. Thus, the total impulse calculation showing 400 Newton-seconds is aligned with the parameters provided in the question.