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11.
A 2.0 kg mass on a spring starts with an amplitude of 0.12 m. Due to friction,
the mass loses 0.0040 J of energy between when it begins moving and when it crosses
through equilibrium. It crosses through equilibrium at a speed of 0.030 m/s. What is the
spring constant of the spring?
equilibrium
x = 0
х3D 12 ст
m
m

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