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When a 150 g mass is suspended on a spring and is stationary in equilibrium, the...

When a 150 g mass is suspended on a spring and is stationary in equilibrium, the spring becomes 1.8 cm longer than it was without the mass.
a) What is the spring constant of the spring?
b) The mass is given a push and begins to oscillate. What frequency does it oscillate with?
c) The maximum velocity of the mass during the oscillation is 0.23 m/s. What amplitude does the oscillation have ?

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