1. The problem statement, all variables and given/known data A 160 g ball attached to a spring with spring constant 2.8 N/m oscillates horizontally on a frictionless table. Its velocity is 20 cm/s when x_0 = 4.5 cm. a_max = _______ cm/s^2 2. The attempt at a solution Using F = ma and F = kx kx = ma a = kx/m Substituting the appropriate values a = (2.8)(4.5)/(.16) = 78.75 cm/s^2 Am I missing something here?