Moment of Inertia Quiz Please refer to http://www.physics.qc.edu/files/543 for a

ID: 1635581 • Letter: M

Question

Moment of Inertia Quiz

Please refer to http://www.physics.qc.edu/files/543 for answers for procedure questions.

1. The angular acceleration is obtained by (Please refer to http://www.physics.qc.edu/files/543 )

a. taking an average value of the angular acceleration graph

b. the coefficient of the squared term of a quadratic fit of the angular position vs. time graph

c. half the coefficient of the squared term of a quadratic fit of the angular position vs. time graph

d. twice the coefficient of the squared term of a quadratic fit of the angular position vs. time graph

e. the slope of a linear fit of the angular velocity vs. time graph

2. In procedure 2, which trial is the largest moment of inertia expected to be obversed? (Please refer to http://www.physics.qc.edu/files/543 )

a. 1

b. 2

c. 3

d. 4

e. 0

3. What quantity is represented by the slope of the linear graph in procedure 2? (Please refer to http://www.physics.qc.edu/files/543 )

a. the moment of inertia of the rod without the masses

b. the mass of the rod

c. the mass of both sliding masses

d. the mass of a single sliding mass

e. the moment of inertia of the sliding masses about their center

4. The cord should be wrapped around which part of the rotation assembly? (Please refer to http://www.physics.qc.edu/files/543 )

a. The smallest pulley

b. The medium sized pulley

c. The large pulley

d. The axle of the device

5. Which correctly describes the tension in the string as the mass accelerates downward? (Please refer to http://www.physics.qc.edu/files/543 )

a. T < mg

b. T = mg

c. T > mg

d. The tension compared to the weight depends on the moment of inertia of the systema

1. Answer : e
The angular acceleration is obtained by the slope of a linear fit of the angular velocity vs time graph.

2. Answer : e
In Procedure 2, the largest moment of inertia is expected to be observed at trial 0 since it has the highest d value.

3. Answer : e
The slope of the linear graph in procedure 2 represents the moment of inertia of the sliding masses about their center.

4. Answer : a
The cord should be wrapped around the smallest pulley of the rotation assembly.

5. Answer : d
The tension compared to the weight depends on the moment of inertia of the system.

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