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craig.16
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Homework Statement
A box is held on a rough plank inclined at an angle of 60° to the horizontal. The box is
released from rest and slides down the plank with a constant acceleration of 5 m/s2. Calculate
the coefficient of kinetic friction between the box and the plank.
Homework Equations
f(k)=mu(k)*N
The Attempt at a Solution
I got:
N=mgcos60=9.81mcos60
F(k)=masin60=5msin60
then rearranged above equation to mu(k)=F(k)/N to give me (500/981)tan60 which came to 0.88 (2dp). Just need to know if my answer is right or if I messed up somewhere.