**Unformatted text preview: **N 8.0 N) . 40 )( 20 . ( k = = n μ e) The applied force is enough to either start the box moving or to keep it moving. The answer to part (d), from Eq. (5.5), is independent of speed (as long as the box is moving), so the friction force is 8.0 N. The acceleration is . s m 45 . 2 ) ( 2 k =-m f F...

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