Rotation in Space: Rod, ISS, Yoyo Motion

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Tapping one end of a rod in the ISS will cause it to rotate about an axis, likely near the end that is tapped, resulting in both translational and rotational motion. The axis of rotation is influenced by the distribution of mass along the rod, with the motion starting at the tapped end and propagating to the other end. In contrast, when a stick is thrown into the air, it appears to rotate around its center of mass. The discussion also touches on yoyo motion, questioning whether a yoyo can be spun while in a floating position. Overall, the mechanics of rotation in microgravity highlight the complex interplay of forces and motion.
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We have a rod and keep floating in ISS. If we tap giving force at one end, will it,
1. Rotate about an axis or
2. Has translational and rotational motion.
If it rotates, where is the axis?

I have interest in yoyo motion too. From YouTube, they spin them while holding. Can we rotate yoyo from floating position?.
 
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azizlwl said:
We have a rod and keep floating in ISS. If we tap giving force at one end, will it,
1. Rotate about an axis or
2. Has translational and rotational motion.
If it rotates, where is the axis?
What do you think?
 
I think it rotates with the axis of the other end, since the near end moves first followed by nearest mass till the other end.
But if we throw a stick to the air it looks like it rotates about the center.
 

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