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A crate of mass 13.5 kg is being pushed with a person across a horizontal floor. The coefficient of static friction among the crate and the surface is 0.500, while the coefficient of kinetic friction is 0.350. The person starts to push, but the crate does not move. The person increases their pushing force until abruptly it begins to move across the floor. What is the acceleration of the crate at the moment it begins to move?

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