A vertical spring oscillates with a period of when a block is hung from it

PHYSICS · Subjective · A Level · Physics · Further mechanics and thermal physics · Further mechanics and thermal physics

Problem

A vertical spring oscillates with a period of

1.0\,\text{s}

when a block is hung from it. If the spring constant is

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

, determine the mass of the block (in kilograms).