Question

A box of weight X is allowed to slide an incline of a°. If the coefficient of kinetic friction between block and incline is 0.1

Find the acceleration down the incline

Answer 1

$m\vec{a}=m\vec{g}+\vec{N}+\vec{F},$

$ma=mgsin\alpha-\mu mg cos\alpha,$

$a=gsin\alpha-0.1 g \cos \alpha.$