In the Figure,two Identical Ideal Massless Springs Have Unstretched Lengths

question 45

Multiple Choice

In the figure,two identical ideal massless springs have unstretched lengths of and spring constants of 700 N/m.The springs are attached to a small cube and stretched to a length L of 0.30 m as in Figure A.An external force P pulls the cube a distance to the right and holds it there.(See Figure B.) The external force P,that holds the cube in place in Figure B,is closest to

• A) 28 N.
• B) 25 N.
• C) 21 N.
• D) 18 N.
• E) 14 N.