The figure shows 3 crates being pushed over a concrete floor by a horizontal force f of magnitude 440N. The masses of the cratesare

\(\displaystyle{m}_{{1}}={30}\) kg,

\(\displaystyle{m}_{{2}}={10}\) kg, and

\(\displaystyle{m}_{{3}}={20}\) kg.The coefficient of kineticfriction between the floor and each of the crates is 0.7. a) what is the magnitude

\(\displaystyle{F}_{{{32}}}\) of the force on crate 3 from crate 2? b) If the crates then slide onto a polished floor, where the coefficientof kinetic friction is less than 0.700, is magnitude PSKF_{32}ZSL more than,less than, or the same as it was when the coeffient was 0.700?