A 4.10-kg block is at rest on a horizontal floor. If you push horizontally on the 4.10-kg block with a force of 12.0 N, it just starts to move. a. What is the coefficient of static friction? b. A 7.00-kg block is stacked on top of the 4.10-kg block. What is the magnitude F of the force, acting horizontally on the 4.10-kg block as before, that is required to make the two blocks start to move together? answer in N

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