A 10-Kg Block on a Horizontal Frictionless Surface Is Attached

Multiple Choice

A 10-kg block on a horizontal frictionless surface is attached to a light spring (force constant = 1.2 kN/m) . The block is initially at rest at its equilibrium position when a force (magnitude P) acting parallel to the surface is applied to the block, as shown. When the block is 8.0 cm from the equilibrium position, it has a speed of 0.80 m/s. How much work is done on the block by the force P as the block moves the 8.0 cm?

A) 8.3 J
B) 6.4 J
C) 7.0 J
D) 7.7 J
E) 3.9 J