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Figure 6-47 shows three crates being pushed over a concrete floor by a horizontal force F of magnitude 425 N. The masses of the crates are m_(1) = 30.0 kg, m_(2)=10.0 kg, and m_(3) = 20.0 kgThe coefficient of kinetic friction between the floor and each of the crates is 0.700. (a) What is the magnitude F_(32) 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 F_(32) more than, less than, or the same as it was when the coefficient was 0.700? |
| Answer» SOLUTION :`(a)F_(32)=m_(3)(a+mu_(K)g)=142N,` (B) The answer here is the same as in part (b) | |