A mass of 4.0 kg,resting on a horizontal,frictionless surface,is attached on the right to a horizontal spring with spring constant 30 N/m and on the left to a horizontal spring with spring constant 50 N/m.If this system is moved from equilibrium,what is the effective spring constant?
A) 16 N/m
B) 80 N/m
C) 20 N/m
D) −20 N/m
Correct Answer:
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