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AP® Physics 1 & 2

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Where is the Rotation Axis?

APPH12-7MHOL0

Shown in the image is a mass-less bar of length, $l$ $=$ $3$ $m$, with a mass hanging at each end.

If the bar is in static equilibrium, how far from the left end of the bar is the rotation axis?

Created for Albert.io. Copyright 2016. All rights reserved.

A

$1.50$ $m$

B

$0.56$ $m$

C

$1.20$ $m$

D

$1.80$ $m$