Rotational Kinetic Energy: A wheel having a moment of inertia of 5.00 kg ? m2 starts from rest and accelerates under a constant torque of 3.00 N ? m for 8.00 s. What is the wheel's rotational kinetic energy at the end of 8.00 s?
A. 57.6 J
B. 64.0 J
C. 78.8 J
D. 122 J
Answer: A
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