A small block is attached to an ideal spring and ... Your question has been answered! Rate it below. Let us know if you got a helpful answer. Question A small block is attached to an ideal spring and is moving in SHM on a horizontal, frictionless surface. The amplitude of the motion is 0.210 m and the period is 3.49 s . What is the acceleration of the block when x= 0.160 m ? What is the speed of the block when x= 0.160 m?