# Neets Module 15 Assignment 3

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1. Can any rapidly spinning object be considered a gyroscope?
Yes.
2. What gyro property causes the gyro to remain in a fixed position?
Rigidity.
3. What type(s) of force does a gyro resist?
Any force that attempts to tilt the spin axis.
4. In what direction will a gyro precess in response to an outside force?
Perpendicular (90�) to the force.
5. A universally mounted gyro has how many gimbals?
Two.
6. What factors determine the rigidity of a gyro?
Rotor speed, weight, shape.
7. What type of force acts ONLY through the center of gravity of a gyro, and does NOT cause precession?
Force of translation.
8. The amount of precession that results from a given force is determined by what quantity?
Rigidity.
9. What factor determines the direction a gyro will precess in response to a particular force?
Direction of spin.
10. When using the right-hand rule to determine precession, which finger indicates the direction of the applied force?
Middle finger.
11. A universally mounted gyro has how many degrees of freedom?
Two.
12. If a free gyro is placed at the equator at 1200 in a vertical position; in what position should it be at 1800?
Horizontal.
13. What are the three causes of mechanical drift in a gyro?
Unbalanced gyro, inertia of gimbals, bearing friction.
14. What is the purpose of an erection system used with a gyro?
To achieve and maintain the proper operating position for the gyro (usually vertical or horizontal).
15. What is the purpose of rotating the gimbal assembly in a gyro using a mercury erection system?
Applies torque at the proper point for correct precession.
16. What are rate gyros primarily used for?
Measuring angular rates.
17. How many degrees-of-freedom does a rate gyro usually have?
One.
18. What gyro characteristic provides the basis of the operation of a rate gyro?
Precession.
19. Operation of an accelerometer is based on what physical property?
Inertia.
20. What type of systems primarily use accelerometers?