A 039 Kg Block on a Horizontal Frictionless Surface Is Attached

question 41

Multiple Choice

A 0.39 kg block on a horizontal frictionless surface is attached to a spring whose force constant is 570 N/m.The block is pulled from its equilibrium position at x = 0 m to a displacement x = +0.080 m and is released from rest.The block then executes simple harmonic motion along the x-axis (horizontal) .When the displacement is x = 0.057 the kinetic energy of the block is closest to:

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