Background

Quizlet

Inertia Table

Time Left:

1. What is the primary purpose of an inertia table in the context of torsional pendulums?

To measure gravitational force
To determine the moment of inertia of different bodies
To calculate torque applied to rotating systems
To determine the weight of an object

2. What is the purpose of a plumb line?

To determine vertical alignment using gravity
To measure horizontal displacement
To suspend rotating machinery
To mark reference points for electrical wiring

3. Why does a plumb bob point directly toward the Earth's center of gravity?

Due to gravitational pull acting vertically downward
Because it is aligned with magnetic north
Because of wind resistance acting on the weight
Because it is magnetized

4. What is torsion?

The motion of an object along a circular path
The action of twisting one end of an object while the other end is fixed
The motion of an object in free fall
The vibration of particles in a transverse wave

5. What are torsional oscillations?

Oscillations involving linear displacement along an axis
Oscillations caused by a force acting vertically
Back-and-forth rotations around an axis due to restoring torque after twisting
Oscillations of objects suspended by a spring

6. What is the working principle of a torsional pendulum?

Gravitational pull and mass displacement
Air resistance and pendulum length
Restoring torque and rotational inertia causing angular SHM
Linear momentum conservation

7. In a torsional pendulum, what provides the restoring force for the oscillation?

Magnetic repulsion
Gravity
Twisting of the wire or string
Elastic string tension

8. What is inertia?

The resistance of an object to any change in its state of rest or uniform motion unless acted upon by an external force
The ability of an object to accelerate rapidly
The tendency of objects to rotate indefinitely
The property that causes objects to attract each other

9. What is the purpose of the mirror on an inertia table?

To measure the weight of the object
To reflect light for visual appeal
To observe surface deformations
To track angular displacement and accurately measure the period of oscillation

10. Which of the following is NOT a use of an inertia table?

Measuring linear acceleration of cars
Determining the moment of inertia
Verifying theoretical values of rotational inertia
Analyzing rotational motion and material properties

11. How can the vertical alignment of an inertia table be checked?

Using a plumbline to check vertical reference
Using a stopwatch
By measuring horizontal displacement
Using a protractor

12. If the inertia table is not vertical, how can you correct it?

Use magnets to hold it in place
Ignore the error if it's small
Tilt the object being measured
Adjust the legs or place shims under them to level the table

13. The motion of an inertia table during use is best described as:

Irregular vibration
Angular simple harmonic motion
Linear harmonic motion
Uniform circular motion

14. What is the moment of inertia?

The speed of rotation of an object
The force required to stop a rotating object
The property by which a body resists changes in its rotational motion about an axis
The distance from the center of mass to the pivot point

15. Which of the following expressions correctly defines the moment of inertia?

I = mr
I = mv²
I = ∑miri²
I = F × r

16. What is the radius of gyration?

The radius of a circle with the same area as the object
The maximum radius of the object
The radius of a disc spinning at maximum velocity
The distance from the axis where all mass can be concentrated to produce the same moment of inertia

17. Which of the following best defines the Theorem of Parallel Axes?

I = Icm + Ma², where Icm is moment of inertia about center of mass axis
I = M × r × v
The moment of inertia of any axis is the difference between two perpendicular axes
I = Icm − Ma²

18. What does the Theorem of Perpendicular Axes state?

Iz = Ix − Iy for a solid sphere
Ix = Iy = 0 for symmetric objects
Iz = Ix + Iy for a 3D body
Iz = Ix + Iy for a planar body