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Posted by 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 - , 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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