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In fixed axis rotation, which forces can be left out of the torque sum?
AForces perpendicular to axis
BForces parallel to the axis
CForces acting at the rim
DForces in the plane of motion
Answer & Solution
Correct answer: B. Forces parallel to the axis
Forces parallel to the axis give torques perpendicular to the axis, which only try to tilt the axis and are balanced by the bearings.
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