Figure shows three crates being pushed over a concrete floor by a horizontal force F of magnitude 440N. The masses of the crates are m₁= 30.0kg, m₂= 10.0kg, and m₃= 20.0kg. The coefficient of kinetic friction between the floor and each of the crates is 0.700.?

(a) What is the magnitude F₃₂ of the force on crate 3 from crate 2?

(b) If the crates then slide onto a polished floor where the coefficient of kinetic friction is less than 0.700, is magnitude F₃₂ more than, less than, or the same as it was when the coefficient was 0.700?

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