A block rests against a horizontal spring fixed to a wall

PHYSICS · Subjective · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

0.50\,\text{kg}

block rests against a horizontal spring fixed to a wall. The spring has force constant

200\,\text{N}\,\text{m}^{-1}

and is compressed by

0.15\,\text{m}

. The coefficient of kinetic friction between the block and the table is

0.25

. The block is released from rest. Determine its speed at the instant the spring returns to its natural length.