Answered: 15-7. Crates A and B weigh 100 lb and… | bartleby

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15-7. Crates A and B weigh 100 lb and 50 lb, respectively.
If they start from rest, determine their speed when t = 5 s.
Also, find the force exerted by crate A on crate B during the
motion. The coefficient of kinetic friction between the
crates and the ground is µ = 0.25.
A
P = 50 lb

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