In an arcade game a 0.099 kg disk is shot

Question

across a frictionless horizontal surface by compressing it against a spring and releasing it.If the spring has a spring constant of 244 N/m and is compressed from its equilibrium position by 4 cm, find the speed with which the disk slides across the surface.
Answer in units of m/s

Answer 1

kx²/2 = mv²/2
v=sqrt(kx²/m)=sqrt(244•16•10⁻⁴/0.099) =...

Answer 2

1.986