Two blocks connected by a string are pulled across a horizontal surface by a force applied to one of the blocks, as shown. The coefficient of kinetic friction between the blocks and the surface is 0.25. If each block has an acceleration of 2.0 m/s2 to the right, what is the magnitude F of the applied force?
?
?
A. 25 N
B. 18 N
C. 11 N
D. 14 N
E. 7.0 N
Answer: A
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