A block on a frictionless surface is attached to a horizontal spring. The spring is stretched so the block is at rest at x = A, then the spring is released.
At what point in the resulting simple harmonic motion is the speed of the block at its maximum?
O x = 0
O x = 0, x = A, and x = -A
O x = 0 and x = -A
O x = 0 and x = A
O x = A and x = -A