- #26

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Anyone?

As a refresher, here's the first problem again:

http://www.ihostphotos.com/show.php?id=182814" [Broken]

My sum of forces, resulted in finding:

By = 49jN

Ay = -49jN

Then for sum of moments about point A, I got this (which is where the starts):

(P*L*sin(theta) - By*cos(theta)*sqrt(4R^2 + a^2) + (W*L/2)*cos(theta))k N-m = 0

then, because I need the distance "a" as a function of L and R, I simplified that down to this:

a= [(P*L*sin(theta) + (W*L/2)*cos(theta))/By*cos(theta)] - 2R

a= [(P*L*tan(theta) + (W*L/2))/By] - 2R

Which is where my confusion really builds. I found By and W, and am given a range for R values and then values for P and L, but NO angle info. So what the heck do I do with the thetas?

As a refresher, here's the first problem again:

http://www.ihostphotos.com/show.php?id=182814" [Broken]

My sum of forces, resulted in finding:

By = 49jN

Ay = -49jN

Then for sum of moments about point A, I got this (which is where the starts):

(P*L*sin(theta) - By*cos(theta)*sqrt(4R^2 + a^2) + (W*L/2)*cos(theta))k N-m = 0

then, because I need the distance "a" as a function of L and R, I simplified that down to this:

a= [(P*L*sin(theta) + (W*L/2)*cos(theta))/By*cos(theta)] - 2R

a= [(P*L*tan(theta) + (W*L/2))/By] - 2R

Which is where my confusion really builds. I found By and W, and am given a range for R values and then values for P and L, but NO angle info. So what the heck do I do with the thetas?

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