Question

Problem 3 Part A block lies on a plane raised an angle θ from the horizontal. Three forces act upon the block: Fv, the force of gravity; Fn, the normal force; and Fr, the force of friction. The coefficient of friction is large enough to prevent the block from sliding (Figure 1) Figure 1 ▼of! Pa 1

Answer 1

(A) forces that lie along the axes with coordinate system a,

F_f & F_n

(B) forces that lie along the axes of the coordinate system b, in which the y axis is vertical

F_w

(C) expression for the sum of the y components of the forces acting on the block

0 sill


(D) expression for the sum of the x components of the forces acting on the block

$F_f \cos \theta -F_n \sin \theta = 0$

(E) Fn = Fwcos(θ)