A 1.80 kilograms box and a 3.80 kilogram box on a perfectly smooth horizontal floor have a spring of force constant 250 N/m compressed between them. The initial compression of the spring is 6 centimeter.
a) Obtain the acceleration of 1.80 kilogram box the instant after they are released.
b) Obtain the acceleration of 3.80 kilogram box the instant after they are released.