Question: A worker slowly moves a 50-kg crate to the left along a loading dock by applying a force P at corner B as shown. Knowing

A worker slowly moves a 50-kg crate to the left along a loading dock by applying a force P at corner B as shown. Knowing that the crate starts to tip about the edge E of the loading dock when a = 200 mm, determine
(a) The coefficient of kinetic friction between the crate and the loading dock,
(b) The corresponding magnitude P of the force.

1.2 m 15 0.9 m lc

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