In Fig. 6-29, a force P acts on a block weighing 45 N. The block is initially at rest on a plane inclined at angle θ = 15^oto the horizontal. The positive direction of the x axis is up the plane. The coefficients of friction between block and plane are ?_s= 0.50 and ?_k= 0.34.In unit vector notation, what is the frictional force on the block from the plane when P is?

(a) (?? 5.0 N)i,

(b) (?? 8.0 N)i, and

(c) (?? 15 N)i?

Transcribed Image Text:

10 x