The device is used to hold an elevator door open. has a stiffness of k 41 N/m an

Question

The device is used to hold an elevator door open. has a stiffness of k 41 N/m and it is compressed 0.26 m determine the horizontal and vertical components of reaction at the pin A and the resultant force at the wheel bearing B. (Figure If the spring PartA Determine the horizontal and vertical components of reaction at the pin A. Express your answers using three significant figures separated by a comma. Assume that the positive and y axes are directed to the right and Az, Ay-7.359,3.3005 Submit Previous Answers Request Answer XIncorrect: Try Again; 2 attempts remaining Figure

Explanation / Answer

Spring force, Fs = 41 x 0.26 = 10.66 N

M = 0

-Fs(150) + Fb cos30(150 + 125) - Fb sin(100) = 0

Fb = (10.66 x 150)/[ cos30(150 + 125) - sin30(100)] = 8.50 N

And

Ax = Fb sin30 = 4.25 N

Ay = Fs - Fb cos30 = 10.66 - (8.50 x cos30) = 3.30 N

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