A person A is trying to keep his balance while on a sled B that is sliding down an icy inc...

A person A is trying to keep his balance while on a sled B that is sliding down an icy incline. Let mA = 78 kg 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.

Figure P3.129