gc textbook chapter 8 Rotational Motion (id: 297219e7d)

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本题目来源于试卷: gc textbook chapter 8 Rotational Motion，类别为 unclassified

[问答题]
Why do tightrope walkers (Fig. 8–35) carry a lonh tz7j-j9bju 8g, narruyck0; dhft(rnq6d5k.,n y l0ow beam?

参考答案:

The long beam increases the rotational inertia of the walker.  If the walker gets off-center from the tightrope, gravity will exert a torque on the walker causing the walker to rotate with their feet as a pivot point.  With a larger rotational inertia, the angular acceleration caused by that gravitational torque will be smaller, and the walker will therefore have more time to compensate. 

The long size of the beam allows the walker to make relatively small shifts in their center of mass to bring them back to being centered on the tightrope.  It is much easier for the walker to move a long, narrow object with the precision needed for small adjustments than a short, heavy object like a barbell.

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