Physics

Problem

0.50\,\text{kg}

block is attached to a light spring of constant

k=40\,\text{N}\!/\!\text{m}

and rests on a frictionless

30^{\circ}

incline with the spring anchored at the top. The block is pulled

0.050\,\text{m}

down the incline (stretching the spring) and released from rest. What is the magnitude of the block’s acceleration immediately after release? a)

4.0\,\text{m/s}^2

0.90\,\text{m/s}^2

4.9\,\text{m/s}^2

8.9\,\text{m/s}^2