A body slipping on a rough horizontal plane moves wioth a deceleationof `4.0 m/s^`. What is cofficient of kineic friction between the block and the plane?

Explanation

Let m=mss of the block
From the freebody diagram,
`R-mg=0`
rarr R=mg…..i`
Again ma=muR=0`
ma=muR`
fro equation i. `ma=u mu g`
`rarr a=mug rarr 4=mug`
`mu=4/g=4/10=0.4`