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**Unformatted text preview: **vertical force must be equal in magnitude to the difference between the weight of each ladder and the force on the bottom of each ladder, 480 N-391 N = 449 N-360 N = 89 N. The magnitude of the force at A is then N. 334 ) N 89 ( ) N 1 . 322 ( 2 2 = + d) The easiest way to do this is to see that the added load will be distributed at the floor in such a way that N. 961 ) N 800 )( 64 . ( and N, 679 ) N 800 )( 36 . ( = + = ′ = + = ′ R R L L F F F F Using these forces in the form for the tension found in part (b) gives N, 53 . 936 ) m 50 . 1 ( ) m 90 . )( N 360 ( ) m 80 . 1 ( ) m 50 . 1 ( ) m 60 . 1 )( N 480 ( ) m 20 . 3 ( =-′ =-′ = R L F F T which is 937 N to three figures....

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