1. The problem statement, all variables and given/known data Two identical springs of spring constant 240 N/m are attached to each side of a block of mass 21 kg. The block is set oscillating on the frictionless floor. What is the frequency (in Hz) of oscillation? Figure: http://edugen.wiley.com/edugen/courses/crs4957/art/qb/qu/c15/fig15_30.gif 2. Relevant equations w = sq(k/m) w = omega = angular frequency k = spring constant m = mass w=2(pi)f f = w/(2pi) 3. The attempt at a solution So this problem seemed simple enough... w = sq(k/m) w = sq(240/21) w = 3.38 f = w/(2pi) f = 3.38/(2pi) = 0.538Hz Why is this wrong? It must have something to do with there being two springs... but I don't know how that would change things.