A body of mass 25kg, moving at 3m/s on a rough horizontal floor is brought to rest after sliding through a distance of 2.5m on the floor. What is the coefficient of sliding friction (g=10)
Answer
Using v=u+at
a =
Using s=ut+
2.5 = 1.5 t
t = 1.67 seconds to stop
then
F = ma
F = 25 1.8 = 45 N
weight = 25g = 250N
coef of friction
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