Two blocks, stacked on top of one another, can move withoutfriction on the horiz

Question

Two blocks, stacked on top of one another, can move withoutfriction on the horizontal surface. The surface between thetwo blocks is rough, however, with a coefficient of static frictionequal to 0.38. Bottom block is 5.0kg. Top block is 2.0kg.
Part A If a horizontal force F is applied to the 5.0kg bottom block,what is the maximum value F can have before the 2.0kg top blockbegins to slip?
Part B If the mass of the top block is increased, does the maximumvalue of F increase, decrease, or stay the same?
Part A If a horizontal force F is applied to the 5.0kg bottom block,what is the maximum value F can have before the 2.0kg top blockbegins to slip?
Part B If the mass of the top block is increased, does the maximumvalue of F increase, decrease, or stay the same?

Explanation / Answer

let the mass of upper block be m and that lower block be M maximum acceleration of the upper block =mg/m=g so the maximum force acting on the lower block should produce a max acceleration g so that no slipping occurs F=(M+m)g=0.38*7*9.8=26.068N this value increases if value of m increases

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