# engineering mechanics

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A person A is trying to keep his balance while on a sled B that is sliding down an icy incline. Let
mA = 78kg and mB = 25 kg be the masses of A and B, respectively. In addition, let the static and
kinetic friction coefficients between A and B be μs = 0.4 and μk = 0.35, respectively. Determine
the acceleration of A if θ = 23˚. Friction between the sled and the incline is negligible.

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