problem05_62

University Physics with Modern Physics with Mastering Physics (11th Edition)

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5.62: a) The most direct way to do part (a) is to consider the blocks as a unit, with total weight 4.80 N. Then the normal force between block B and the lower surface is 4.80 N, and the friction force that must be overcome by the force F is N, 1.44 or N, 1.440 N) 80 . 4 )( 30 . 0 ( k = = n μ to three figures. b) The normal force between block B and the lower surface is still 4.80 N, but since block
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Unformatted text preview: A is moving relative to block B , there is a friction force between the blocks, of magnitude N, 0.360 N) 20 . 1 )( 30 . ( = so the total friction force that the force F must overcome is N 1.80 N 0.360 N 440 . 1 = + . (An extra figure was kept in these calculations for clarity.)...
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