13. Rotational Inertia & Energy
Intro to Rotational Kinetic Energy
Multiple Choice
Multiple ChoiceWhen solid sphere 4 m in diameter spins around its central axis at 120 RPM, it has 10,000 J in kinetic energy. Calculate the sphere's mass.
A
79 kg
B
317 kg
C
493 kg
D
1.97×106 kg
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