- 1 points SerCP 10 8.????. My Notes Ask Your Teacher One end of a uniform f-4.6

Question

- 1 points SerCP 10 8.????. My Notes Ask Your Teacher One end of a uniform f-4.60-m-long rod of weight w is supported by a cable at an angle of ? 370 with the rod. The other end rests against a wall, where it is held by friction (see figure). The coefficient of static friction between the wall and the rod is ?s 0.560. Determine the minimum distance x from point A at which an additional weight w the same as the weight of the rod) can be hung without causing the rod to slip at point A ar Need Help?Read It Practice Another Version Submit Assignment Save Assignment Progress Home My Assignments Extension Request WebAssign401987-2018 Advanced Instructionel Systems, Inc. All rights reserved

Explanation / Answer

Fx : N ? T cos(?) = 0

Fy : T sin(?) + Fr ? 2 × w = 0, and

Moment : T × Lsin(?) ? w × L /2 ? w × x = 0, ................(T is string tension)

Fr ? µsN.

this implies

2 × w = T sin(?) + Fr ? T sin(?) + µs × T cos(?)

T sin(?) ? 2 × w /(1 + µs × cot(?) ),

also,

T sin(?) = w × ( 1/ 2 + x/ L ) .

from the two equations

x ? L ( 2/( 1 + µs × cot(?)) ? 1 /2 ) = 4.6 × ( 2/( 1 + 0.56 × 1.327) ? 1 /2 ) = 2.977 m

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