Ablock with mass of 5 kg is forced against a horizontal spring of negligible mass. the spring is compressed a distance of 420 m. the force constant k of the spring is, k = 90 n/m. the spring and bax are released from rest, after 420m when the box reaches its equilibrium point the box loses contact with the spring and slides along a horizontal surface that has some friction: µ-0.15 part 1.what is the speed of the box the instant it leaves the spring? give your answer to 4 significant digits. part 2. how far does the box travel from release before it comes to a stop? give your answer to 2 significant digits.