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abbyhoward9302
06.09.2019 •
Physics
The masses and coordinates of four particles are as follows: 26 g, x = 3.0 cm, y = 3.0 cm; 18 g, x = 0, y = 6.0 cm; 15 g, x = -4.5 cm, y = -4.5 cm; 23 g, x = -3.0 cm, y = 6.0 cm. what are the rotational inertias of this collection about the (a) x, (b) y, and (c) z axes?
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Ответ:
1)![I_{x}=2013.1gcm^{2}](/tpl/images/0224/7951/47277.png)
2)![I_{y}=744.75gcm^{2}](/tpl/images/0224/7951/9789b.png)
3)![I_{z}=2747.85gcm^{2}](/tpl/images/0224/7951/7d0c4.png)
Explanation:
Since the given masses are completely in xy plane we have
Moment of inertia about x axis equals
Applying the values we get
Similarly
Moment of inertia about y axis equals
Applying the values we get
Now by theorem of perpendicular axis of moment of inertia we have
Appying values we get
Ответ:
or any weather is the correct answer to this question