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Precession is the response of a gyroscope to an applied torque, and the resulting motion appears

  • A.Along the spin axis
  • B.At 90 degrees to the applied force, in the direction of spin
  • C.In the same direction as the applied force
  • D.Opposite to the applied force

Answer: B

The rule is to move the point of applied force 90 degrees around the rotor in the direction of rotation and apply it there. It is the mechanism erection systems use deliberately and the mechanism bearing friction exploits as an unwanted drift.

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