In the figure,two identical springs have unstretched lengths of 0.25 m and spring constants of 300 N/m.The springs are attached to a small cube and stretched to a length L of 0.36 m as in Figure A.An external force P pulls the cube a distance D = 0.020 m to the right and holds it there.(See Figure B.)The work done by the external force P in pulling the cube 0.020 m is closest to
A)0.12 J.
B)0.060 J.
C)6.0 J.
D)12 J.
E)0.80 J.

Question

In the figure,two identical springs have unstretched lengths of 0.25 m and spring constants of 300 N/m.The springs are attached to a small cube and stretched to a length L of 0.36 m as in Figure A.An external force P pulls the cube a distance D = 0.020 m to the right and holds it there.(See Figure B.)The work done by the external force P in pulling the cube 0.020 m is closest to 
A)0.12 J. 
B)0.060 J. 
C)6.0 J. 
D)12 J. 
E)0.80 J.

Quizplus · Accepted Answer

The Answer of In the figure,two identical springs have unstretched lengths of 0.25 m and spring constants of 300 N/m.The springs are attached to a small cube and stretched to a length L of 0.36 m as in Figure A.An external force P pulls the cube a distance D = 0.020 m to the right and holds it there.(See Figure B.)The work done by the external force P in pulling the cube 0.020 m is closest to 
A)0.12 J. 
B)0.060 J. 
C)6.0 J. 
D)12 J. 
E)0.80 J.

In the Figure,two Identical Springs Have Unstretched Lengths of 0