physics
posted by Anonymous .
In an arcade game a 0.144 kg disk is shot
across a frictionless horizontal surface by com
pressing it against a spring and releasing it.
If the spring has a spring constant of
164 N/m and is compressed from its equi
librium position by 7 cm, find the speed with
which the disk slides across the surface.
Answer in units of m/s

Compressed spring potential energy = Released disk kinetic energy.
(1/2) k X^2 = (1/2) m V^2
k = 163 N/m
V = X* sqrt(k/m)
= (0.07 m)*sqrt(167/0.144)
You do the numbers.