Duration of Contact
What is the best way to estimate or measure the duration of a contact in a collision?
I have a stick applying a 1.5 N force onto a stationary plastic box. Assuming that the plastic is incompressible, how long will the time have elapsed before the stick with 1.5 N no longer has an effect on the box?
I might be leaving out some important information on materials, etc.. Please make the necessary assumptions.