Problem 15-7: Engineering Mechanics- Dynamics (Hibbeler 14th Edition)

Engineering Mechanics Dynamics · R.C. Hibbeler · Chapter 15

Question

Crate A weighs 100 lb and crate B weighs 50 lb. A horizontal force $P = 50\text{ lb}$ is applied to crate A, pushing crate B in front of it. Both crates start from rest and slide together on the ground. The coefficient of kinetic friction between the crates and the ground is $\mu_k = 0.25$. Determine (a) the speed of both crates when $t = 5\text{ s}$, and (b) the force exerted by crate A on crate B during the motion.

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