14. Torque & Rotational Dynamics
Torque & Acceleration (Rotational Dynamics)
Multiple Choice
Multiple ChoiceSuppose that piano has a long, thin bar ran through it (totally random), shown below as the vertical red line, so that it is free to rotate about a vertical axis through the bar. You push the piano with a horizontal 100 N (blue arrow), causing it to spin about its vertical axis with 0.3 rad/s2 . Your force acts at a distance of 1.1 m from the bar, and is perpendicular to a line connecting it to the bar (green dotted line). What is the piano's moment of inertia about its vertical axis?
A
250 kg•m2
B
285 kg•m2
C
303 kg•m2
D
367 kg•m2
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