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Far in space, where gravity is negligible, a 425 kg rocket
Chapter 9, Problem 11E(choose chapter or problem)
Far in space, where gravity is negligible, a \(425 \mathrm{~kg}\) rocket traveling at \(75 \mathrm{~m} / \mathrm{s}\) fires its engines. Figure EX9.11 shows the thrust force as a function of time. The mass lost by the rocket during these \(30 \mathrm{~s}\) is negligible.
a. What impulse does the engine impart to the rocket?
b. At what time does the rocket reach its maximum speed? What is the maximum speed?
Equation Transcription:
Text Transcription:
4.5 kg
75 m/s
30 s
Questions & Answers
QUESTION:
Far in space, where gravity is negligible, a \(425 \mathrm{~kg}\) rocket traveling at \(75 \mathrm{~m} / \mathrm{s}\) fires its engines. Figure EX9.11 shows the thrust force as a function of time. The mass lost by the rocket during these \(30 \mathrm{~s}\) is negligible.
a. What impulse does the engine impart to the rocket?
b. At what time does the rocket reach its maximum speed? What is the maximum speed?
Equation Transcription:
Text Transcription:
4.5 kg
75 m/s
30 s
ANSWER:Step 1 of 2
a)
Here we have to find the impulse.
We know that,
The area of the triangle given, must give the impulse.
The area is,
So, the impulse will be,
