A 200 g ball attached to a spring with spring constant 2.40 N/m oscillates horizontally on a frictionless table. Its velocity is 20.0 cm/s when x=−5.00cm.
What is the amplitude of oscillation?
x(t) = Acos(2πft)
v(t) = -2πfAsin(2πft)
The Attempt at a Solution
I found that t = 0.137s, and A turned out to be negative, so it was probably wrong.