A ball vibrates back and forth from the free end of an ideal spring having a force constant (spring constant) of 20 N/m. If the amplitude of this motion is 0.30 m, what is the kinetic energy of the ball when it is 0
30 m from its equilibrium position? A) 0.00 J
B) 0.22 J
C) 0.45 J
D) 0.90 J
E) 1.4 J
A
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