A 2 kg starts at rest and slides down from the top of a curved ramp.The block encounters an unstretched spring with a force constant of 245N/m .

A 2 kg starts at rest and slides down from the top of a curved ramp.The block encounters an unstretched spring with a force constant of 245N/m . How long is the block in contact with the spring before it momentarily comes to rest. Assume no friction during the whole process.