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The 50kg crate is resting on a 15 deg. inclined plane. The us= 0.20 and uk...

The 50kg crate is resting on a 15 deg. inclined plane. The us= 0.20 and uk = 0.15 at the surface of contact between the crate and the plane. If a force P, acting upward and parallel to the inclined plane is applied, determine acceleration if a) P=0, b) P=120N, and c) P= 350N.

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