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Questions tagged [inertia]

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6 votes
2 answers
171 views

How do modern space capsules ascertain their position during the communication blackout phase of reentry?

In this video recording of Orion's reentry, you can hear and see the RCS thrusters firing during the communication blackout phase. During the communication blackout, I would assume that GPS would not ...
4 votes
1 answer
193 views

How do Inertial Navigation Systems compensate for their inability to measure gravitational acceleration?

Inertial Navigation Systems calculate position by measuring acceleration. But they are unable to measure gravitational acceleration since gravity always acts equally on the test mass and the ...
5 votes
2 answers
385 views

Why can't a regular hammer be used in micro-gravity?

A comment under this question states that "A good smack of a hammer" - is not a simple thing in zero gravity. You need a special hammer with absorption of inertia. Why is this the case? ...
3 votes
1 answer
493 views

Moment of inertia data for rocket stage?

I'm modeling a rocket launch and would like to compare my calculated moments of inertia to actual real-world data from other rockets. Any rocket would do, though those similar in size to Falcon 9 ...