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Jimmer7
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Homework Statement
A toboggan carrying two children with a total mass of 85.0 kg reaches its maximum speed at the bottom of a hill, and then glides to a stop in 21.0 m along a horizontal surface. The coefficient of kinetic friction between the toboggan and the snow surface is 0.110. Calculate the work done by the kinetic friction?
Homework Equations
W=FCosθΔd
The Attempt at a Solution
m = 85 kg
Δd = 21.0 m
θ = 0
W = ?
Mu = 0.110
I'm pretty confused on this, do I somehow get Mu to Ff and then plug it into the work equation?
The final answer is -1.90 x10^3 J but from what I've tried I never got it.