Answer to Question #286423 in Classical Mechanics for alex

Question

A horizontal mass-spring system with mass 2kg and spring constant 100N m

and released. What is the maximum speed obtained by the mass?

Answer 1

Seems like some part of the condition is missing. However, the maximum speed can be found from the following equation (derived from the conservation of energy):

$$v=x\sqrt\dfrac km.$$

What missing here is the compression x of the spring.