In an arcade game a 0.086 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
173 N/m and is compressed from its equi-
librium position by 8 cm, find the speed with
which the disk slides across the surface.
Answer in units of m/s

Question

In an arcade game a 0.086 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
173 N/m and is compressed from its equi-
librium position by 8 cm, find the speed with
which the disk slides across the surface.
Answer in units of m/s

anonymous · Answer

I think you need to use $$W _{spring} = \Delta K$$

anonymous · Answer

W= work and K = kinetic energy.

anonymous · Answer

so its $$\frac{ 1 }{ 2 } kx ^{2} = \frac{ 1 }{2 }mV ^{2}$$
Then solve for V

anonymous · Answer

k = spring constant

doc.brown · Answer

$$v=\sqrt{\frac{kx^{2}}{m}}$$