10、 In Figure 10, a horizontal force of 500 N acts on a block of weight 1.5 kN placed on an
inclined plane. The coefficients of friction between the block and the plane are μ
s =0.25 andμ
k = 0.20 . What is the actual frictional force?
(A) 200N
(B) 500 N
(C) 300 N
(D) 450 N。
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