A 039 Kg Object,attached to a Spring with Spring Constant K

Multiple Choice

A 0.39 kg object,attached to a spring with spring constant k = 15 N/m,is moving on a horizontal frictionless surface in simple harmonic motion of amplitude of 0.082 m.What is its speed at the instant when its displacement is 0.041 m? (Hint: Use conservation of energy. )
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A) 4.4 m/s
B) 8.8 m/s
C) 44 cm/s
D) 56.9 cm/s
E) ​31.1 cm/s