A 10-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?
◦ 0.85 m/s
◦ 0.89 m/s
◦ 0.77 m/s
◦ 0.64 m/s
◦ 0.52 m/s