Question

Question 3 (10 Marks) Two boxes, A and B, have uniform weights of 350 kN and 250 kN, respectively. They are stacked on the ground as shown in Figure 3. The coefficients of static and kinetic frictions between the boxes are μbox,-0.4 and μboxk-0.3, respectively. Between box B and the ground, they are μgrounds-0.2 and lgrundk 0.1. A horizontal force P is being applied at box A at the location shown in Figure 3, and it increases gradually in value. What is going to happen to the boxes? Show all relevant calculations. The effects of the boxes' thicknesses (i.e. the dimension perpendicular to the paper plane) on the potential movements can be neglected. In A, 350 kN 4 Im B, 250 kN Ground 5 m

Answer 1

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