Homework Help: physics

Posted by Anonymous on Sunday, February 10, 2013 at 10:53am.

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

physics - drwls, Sunday, February 10, 2013 at 1:12pm
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.

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