Two wooden crates rest on top of one another. The smaller top crate has a mass o

Question

Two wooden crates rest on top of one another. The smaller top crate has a mass of m1 = 16.0 kg and the larger bottom crate has a mass of m2 = 90.0 kg. There is NO friction between the crate and the floor, but the coefficient of static friction between the two crates is ?s = 0.77 and the coefficient of kinetic friction between the two crates is ?k = 0.6. A massless rope is attached to the lower crate to pull it horizontally to the right (which should be considered the positive direction for this problem).

2- what is the frictional force the lower crate exerts on the upper crate in (N)?

Explanation / Answer

let.. e.g.. 4)Since µk = 0.69, the maximum force that can be exerted by friction is given by F=µk = 0.69*N, where N is the same normal force we had before. So the force is 169.2225 newtons, therefore the acceleration is 6.7689m/s² (by F=ma) hope will b hlpfull

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