Physics

Physics

Problem

A mass of 2.0 kg2.0\,\text{kg} is hung from a single vertical light spring and produces a steady extension of 0.050 m0.050\,\text{m}. The same mass is then hung from two identical springs connected in series, one below the other. Take g=9.8 m s−2g = 9.8\,\text{m s}^{-2}. a. (i) Calculate the spring constant of one of the springs from the first arrangement. b. (ii) Determine the total extension produced in the two-spring series arrangement by the same mass. c. (iii) Calculate the total elastic potential energy stored in the two springs together in the series arrangement.
Intuitive explanation

When a mass hangs from a spring, it stretches until the spring force balances gravity—that's your equilibrium condition. The key insight is understanding how spring constants combine: springs in series act like they're "weaker" together because each one stretches independently to support the same weight. Use your single-spring result to find the spring constant, then figure out how that constant changes when two identical springs share the load in series.

Intuitive explanation

When a mass hangs from a spring, it stretches until the spring force balances gravity—that's your equilibrium condition. The key insight is understanding how spring constants combine: springs in series act like they're "weaker" together because each one stretches independently to support the same weight. Use your single-spring result to find the spring constant, then figure out how that constant changes when two identical springs share the load in series.

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