A ball of mass m1, connected to another mass m2 by a string, is whirled at a constant speed in a horizontal circle of radius R equal to 0.800m. If the mass m2 = 5.00 kg, the kinetic energy of the ball is
A) 0.981 J
B) 2.45 J
C) 4.90 J
D) 19.6 J
E) 39.2 J
Correct Answer:
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