Ask
Login
0
9.9kviews
A block of weight 800N is acted upon by a horizontal force P as shown in figure. If the coefficient of friction between the block and inclined are
written 9.3 years ago by gravatar for teamques10 teamques10 ★ 70k •   modified 6.0 years ago

$μ_s=0.35$ and $μ_k=0.25,$ determine the value of P for imending motion up the plane.

enter image description here
engineering mechanics
ADD COMMENT EDIT
1 Answer
4
3.1kviews
written 9.3 years ago by gravatar for teamques10 teamques10 ★ 70k

enter image description here

$∑f_x =0 \\ P- μR \cos 25-R \sin⁡25=0 →(1) \\ ∑f_y =0 \\ -μR \sin 25+R \cos25-800=0 \\ R=1054.86 N $

From equation (1),

$P=0.35×1054.86 \cos⁡25+ 1054.86 \sin⁡25 \\ P=780.41 N $
ADD COMMENT EDIT
Please log in to add an answer.