Question

A 240 g air-track glider is attached to a spring. The glider is pushed in 11.2 cm against the spring, then released. A student with a stopwatch finds that 14 oscillations take 14.0 s. What is the spring constant?

Answer 1

the time requared for one oscillation,t =14/14

                                                       t = 1 s

    But t = 2π√m/k

         1/2π = √m/k

==> k = m/(1/2π)^2

       ∴  k =0.240/0.025 N/m

=9.6N/m