Calculating Speed of Simple Harmonic Motion with Initial Displacement

[aechols1]

Please help with the following problem:

A 0.1 kg block rests on a level surface and is attached to a horizontally aligned spring with a spring constant of 32 N/m. The block is initially displaced 4 cm from the equilibrium position and then released to set up a simple harmonic motion. A frictional force of 0.3 N exists between the block and the surface. What is the speed of the block when it passes through the equilibrium position after being released from the initial 4 cm displacement point?

 

[coalquay404]

This sounds very much like a homework problem. Tell us what you have done to solve it so far and we can help to point you in the right direction.