1. A 500 – N box is pushed across a horizontal floor with a force of 250 N. The coefficient of kinetic friction is 0.40. (a) Find the work done in pushing the box 20 m. (b) How much work went into overcoming friction and how much into accelerating the box?

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Q: st a friction

A: Given: Mass of crate is 1200 N Constant speed is 5 m Friction force is 210 N

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