a block with a velocity 4m/s slides 8m across a rough horizontal floor before coming to rest.the coefficient of friction is.

Answer 1

F * d = energy lost to friction = (1/2) m v^2

m g mu d = (1/2) m v^2

9.81 mu (8) = .5 (16) = 8

mu = 1/g = about .1

Answer 2

.80