Two springs with force constants of 30 N/m and 20 N/m are connected in parallel. When an object is hung from the springs, they extend 0.30 m. Assuming that the acceleration of gravity is 10 m/s2, the mass of the object is
A) 0.50 kg.
B) 1.0 kg.
C) 1.5 kg.
D) 2.0 kg.
Correct Answer:
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