The smooth plug has a weight of 20 lb and is pushed against a series of Belleville sprin...

The smooth plug has a weight of 20 lb and is pushed against a series of Belleville spring washers so that the compression in the spring is s = 0.05 ft. If the force of the spring on the plug is where s is given in feet, determine the speed of the plug after it moves away from the spring. Neglect friction.