A 210 g air-track glider is attached to a spring. The glider is pushed in 12.0 cm against the spring, then released. A student with a stopwatch finds that 13 oscillations take 16.0 s. Find the spring constant k.

Answer 1

see link 1 below under related questions.

a very similar problem was answered.

Answer 2

T = 16 s/ 13 = 1.23 s
T = 2pi sq rt (m/k)
1.23 = 2 pi sq rt (.21 g/k)
k = 5.473