Two blocks of masses m_{1}=2.0 \mathrm{~kg} and m_{2}=1.0 \mathrm{~kg} are stacked together on top of a frictionless table as shown. The coefficient of static friction between the blocks is \mu_{s}=0.20. What is the minimum horizontal force that must be applied to the top block to make it slide across the bottom block?
Answer Choices
A. 4.0 \mathrm{~N}
B. 6.0 \mathrm{~N}
C. 8.0 \mathrm{~N}
D. 12.0 \mathrm{~N}
E. The top block will not slide across the bottom block
