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?