The coefficient of static friction between the block and the

The coefficient of static friction between the block and the surface is shown in the figure. The force P is always applied horizontally. Determine the smallest value of P required to start the block moving up the surface and the corresponding friction force F, to start the block moving down the surface and the corresponding friction force F. The smallest value of P required to start the block moving up the surface is: 483 N 451N 398N 439N The corresponding friction force F is: 94.8 N 131 N 112 N 169 N The smallest value of P required to start the block moving down the surface is: 197 N 143 N 169 N 181 N The corresponding friction force F to start the block moving down the surface is: 104 N 88.5 N 79.7 N 126 N

Solution

1 (B) (ONLY US PLAYS ROLE IN THIS CONDITION)

2 (C)

3 (C)

4 (A)