Question

SAMPLE You are measuring the moment of inertia and mass of a meterstick, as in lab. In this case the pulley attached to the meterstick has a radius of 2.00 cm, different from the value in lab. The following values are obtained for the hanging mass and the angular acceleration ?.................. Trial Total mass hanging from cord Angular Acceleration of meterstick 1 30.0 grams 0.392 rad/sec$^2$ 2 50.0 grams 0.653 rad/sec$^2$ 3 70.0 grams 0.913 rad/sec$^2$ 4 90.0 grams 1.17 rad/sec$^2$ m ???????? For each of the four trials, calculate the torque exerted on the disk. (Be sure to show your work.) Carefully construct a large graph of torque vs. angular acceleration, and from the slope determine the moment of inertia of the disk. Include units! (final answer: 0.0151 kg m$^2$) From the results of your experiment, what is the mass of the meterstick? (final answer: 181 g) Now imagine that we balance the meterstick on a pivot point by placing a 160 gram weight 18.0 cm from the \"0 cm\" end of the meterstick. Using your value of the meterstick mass, determine the position of the pivot point. Be specific! (final answer: pivot point is 35.0 cm from the \"0 cm\" end of the meterstick.) x=?? cm x=18.0 cm 160 g ???????

          SAMPLE
You are measuring the moment of inertia and mass of a meterstick, as in lab. In this case
the pulley attached to the meterstick has a radius of 2.00 cm, different from the value in
lab. The following values are obtained for the hanging mass and the angular acceleration
?..................
Trial Total mass hanging from cord Angular Acceleration of meterstick
1 30.0 grams 0.392 rad/sec$^2$
2 50.0 grams 0.653 rad/sec$^2$
3 70.0 grams 0.913 rad/sec$^2$
4 90.0 grams 1.17 rad/sec$^2$
m
????????
For each of the four trials, calculate the torque exerted on the disk. (Be sure to show your
work.) Carefully construct a large graph of torque vs. angular acceleration, and from the
slope determine the moment of inertia of the disk. Include units!
(final answer: 0.0151 kg m$^2$)
From the results of your experiment, what is the mass of the meterstick?
(final answer: 181 g)
Now imagine that we balance the meterstick on a pivot point by placing a 160 gram
weight 18.0 cm from the \"0 cm\" end of the meterstick. Using your value of the
meterstick mass, determine the position of the pivot point. Be specific!
(final answer: pivot point is 35.0 cm from the \"0 cm\" end of the meterstick.)
x=?? cm
x=18.0 cm
160 g
???????

SAMPLE
You are measuring the moment of inertia and mass of a meterstick, as in lab. In this case
the pulley attached to the meterstick has a radius of 2.00 cm, different from the value in
lab. The following values are obtained for the hanging mass and the angular acceleration
?..................
Trial Total mass hanging from cord Angular Acceleration of meterstick
1 30.0 grams 0.392 rad/sec^2
2 50.0 grams 0.653 rad/sec^2
3 70.0 grams 0.913 rad/sec^2
4 90.0 grams 1.17 rad/sec^2
m
????????
For each of the four trials, calculate the torque exerted on the disk. (Be sure to show your
work.) Carefully construct a large graph of torque vs. angular acceleration, and from the
slope determine the moment of inertia of the disk. Include units!
(final answer: 0.0151 kg m^2)
From the results of your experiment, what is the mass of the meterstick?
(final answer: 181 g)
Now imagine that we balance the meterstick on a pivot point by placing a 160 gram
weight 18.0 cm from the 0̈ cmënd of the meterstick. Using your value of the
meterstick mass, determine the position of the pivot point. Be specific!
(final answer: pivot point is 35.0 cm from the 0̈ cmënd of the meterstick.)
x=?? cm
x=18.0 cm
160 g
???????

Added by Lauren U.

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