- #1
seizureboi
- 8
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Homework Statement
A 3kg block is pulled by a rope up a 37 degree incline at constant speed. If the tension in the rope is 45N and the rope is parallel to the incline, calculate the coefficient of kinetic friction between the block and the incline.
Homework Equations
a = acceleration (0 m/s2)
Ө = theta (37 degrees)
g = 9.8 m/s2
m = mass
T = Tension
μ = coefficient of friction
NF = Normal Force
friction = μNF
NF = mgcosӨ
The Attempt at a Solution
My attempt was setting up the equation: TsinӨ - mgsinӨ - friction = ma
OR 45sin(37) - (3)(9.8)sin(37) - μ(3)(9.8)cos(37) = 0
OR 27.1 - 17.7 = μ23.5
OR 9.4 = μ23.5
Finally, μ = .4
Just wondering if it's correct. =)