physics
posted by jake .
A mass of 2.9 g is hanging underneath a spring which has an unknown spring constant. The period of oscillation is 5.5 seconds. Find the spring constant in N/m. Give your answer to 2 s.f.

T = 2 pi sqrt (m/k)
5.5 = 2 pi sqrt (.0029/k)
.87535 = sqrt (.0029/k)
.766= .0029/k
k = .0038 N/m