Question

The weight of the box is W = 246 lb and the coefficient of static friction between the box and the floor is 0.55. Neglect the weights of the bars. What is the largest value of the force F that will not cause the box to slip?

4 in 4 in 8 in F 8 in W

Answer 1

Given sin 4 in uin * de B А 8 in 450 W = The weight of the box is 246 lb coefficient of static friction between the & the floor is 0.55 free body diagram of AB box А A wind Fuin B HA. E 8 in RB Sino 71 145 RA R Rols EMA=0 RB erso x 8 - FX450 w RB = 4 F 8 uso 4 F 8 l345 RB - f 2 L 45

Now Free body diagram BC RB RB Uso RR sino MW Sfx=0 RB Sino =MW w F sin 45 2 W345 = 0.558 246 w F - 2 x 0.55 X 246 27 0.6 lb .. The largest value of the force F = 270.6 lb that will not cause the box to slip. max