A 3-kg piece of putty is dropped 2 m onto the initially stationary 28-kg block, which is...

A 3-kg piece of putty is dropped 2 m onto the initially stationary 28-kg block, which is supported by four springs, each of which has a constant k=800 N/m. Determine the displacement x as a function of time during the resulting vibration, where x is measured from the initial position of the block as shown.