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A physics diagram showing two wooden crates connected by a chain. Forces and masses are labeled: a 35 N horizontal force on the left crate, which has a mass of 6 kg, and vertical 5 N forces. The right crate has a mass of 4 kg and vertical 3 N forces. The background is a textured brown.

A physics diagram showing two wooden crates connected by a chain. Forces and masses are labeled: a 35 N horizontal force on the left crate, which has a mass of 6 kg, and vertical 5 N forces. The right crate has a mass of 4 kg and vertical 3 N forces. The background is a textured brown.

Two crates are connected and slide together across a rough surface. Crate X has mass 6 kg and crate Y has mass 4 kg. A horizontal force of 35 N is applied to crate X. The friction force on crate X is 5 N and on crate Y is 3 N. See more