AT&T; 4{ 1(11 % 7:08 PM Stability of Equilibrium - Torque Begin Date: 11\'13 201

Question

AT&T; 4{ 1(11 % 7:08 PM Stability of Equilibrium - Torque Begin Date: 11'13 2017 12:01:00 AM Due Date: 11/15/2017 11:59:00 PM End Date: 11 20 2017 11:59:00 PMM (25%) Problem 2: A 17.0-m-high and 110-m-long wall and its bracing under construction are shown in the figure wind 17.0m 8.5m Assignment Status Click here for detailed view 10 braces ©theexpertta.com Problem calculate the force, in newtons, exerted by each of the 10 braces if a strong wind exerts a horizontal force of 670 N on each square meter of the wall Assume that the net force from the wind acts at a height halfway up the wall and that al braces exert equal forces parallel to their lengths. Neglect the thickness of the wall Status Partial Grade Summary Deductions Potential 090 100% sin01 tan() acos) cos() Submissions Attempts remaiing: 7 (2% per attempt) detailed view 4 5 6 atan acotan) sinh0 cosh0 tanh cotanho Degrees O Radians VO Subnit Hint l give up! ITints: 0% deduction per hint. T Tints remaining: 2 Feedback: 0% deduction per feedback.

Explanation / Answer

Using torque balance:

Net torque = 0

torque)CW = torque)ACW

R*Fwind = 10*(r*Fb)

R = 8.5 m

r = 8.5*sin 35 deg = 4.88 m

Fwind = Pressure*Area = (670 N/m^2)*(17*11 m^2) = 125290 N

Fb = R*Fwind/(10*r)

Fb = 8.5*125290/(10*4.88)

Fb = 21823.05 N

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