A spring with a spring constant of 8.0 N/m is initially compressed to 5.0 cm. The work done (by the external force) as it is compressed another 15 cm, to a total compression of 20 cm, is
A) 0.85 J.
B) 0.54 J.
C) 0.25 J.
D) 0.15 J.
E) 0.09 J.

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The Answer of A spring with a spring constant of 8.0 N/m is initially compressed to 5.0 cm. The work done (by the external force) as it is compressed another 15 cm, to a total compression of 20 cm, is
A) 0.85 J.
B) 0.54 J.
C) 0.25 J.
D) 0.15 J.
E) 0.09 J.

A Spring with a Spring Constant of 8