Hello. I have been asked if it is correct to say that the force of a spring is conservative. So, for a mass attached to a spring on the roof it's OK. Now consider two masses linked by a spring. Now the potential will depend on both coordinates. It is now not so clear to me any of the properties of conservative forces. Closed loop integral = 0 and so forth. Neither the fact rot F = 0 => consrevative Any comments will be appreciated.