physics
posted by Kevin .
A box slides down a 33° ramp with an acceleration of 1.38 m/s2. Determine the coefficient of kinetic friction between the box and the ramp.

physics 
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Component of force along the plane (downward), F
= mgsin(θ)
Let frictional force be ff, then
ff=μmgcos(θ)
Net acceleration
(Fff)/m = 1.38 m/s²
Solve for μ
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