Newton’s second law: Force equals mass times acceleration (__=___).
1 answer:
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Answer:
Mu,k between the floor and the box is 0.609
Explanation:
given information:
weight of the book, W = 325 N
applied force, F = 425 N
angle, θ = 35.2°
to find the coefficient kinetic between the floor and the box, wee need to calculate the horizontal and vertical force.
first we calculate the vertical force, there are weight, normal force(N) and applied vertical force.
according to Newton's first law
ΣF = 0
Σ = 0
W - N + F sin θ = 0
N = W + F sin θ
Next, we calculate the force in horizontal direction. applied force and friction force()
Σ = 0
F cos θ - = 0
F cos θ - μk (W - F sin θ) = 0
μk = (F cos θ) / (W + F sin θ)
= (425 cos 35.2°)/(325+425 sin 35.2°)
= 0.609