A 039-Kg Block on a Horizontal Frictionless Surface Is Attached to to an Ideal

A 0.39-kg block on a horizontal frictionless surface is attached to an ideal spring whose force constant (spring constant) is 570 N/m. The block is pulled from its equilibrium position at x=0.000 m to a displacement x=+0.080 m and is released from rest. The block then executes simple harmonic motion along the horizontal x -axis. When the position of the block is x=0.057 m, its kinetic energy is closest to

A) 1.1 J
B) 0.95 J
C) 0.84 J
D) 1.0 J
E) 0.90 J

Correct Answer:

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