A 12-Kg Block on a Horizontal Frictionless Surface Is Attached

Multiple Choice

A 12-kg block on a horizontal frictionless surface is attached to a light spring (force constant = 0.80 kN/m) . The block is initially at rest at its equilibrium position when a force (magnitude P = 80 N) acting parallel to the surface is applied to the block, as shown. What is the speed of the block when it is 13 cm from its equilibrium position?

A) 0.78 m/s
B) 0.81 m/s
C) 0.71 m/s
D) 0.58 m/s
E) 0.64 m/s