MetsFan
Well-known member
The problem involves finding the bending stress of a beam. The beam is 48 inches long, supported on both ends, and has a distributed load of 20 lb/in.
I know you have to use My/I to find the bending stress, but how do you find M? I thought since it's a distributed load, then it would just be 20lb/in (distributed load) x 48 in (length of beam) x 24 in. (distance from edge to midpoint), but the solutions uses Wx/2(l-x) where x = l/2. Why do they divide Wx by 2? Isn't that the equation for a triangle?
Thanks.
I know you have to use My/I to find the bending stress, but how do you find M? I thought since it's a distributed load, then it would just be 20lb/in (distributed load) x 48 in (length of beam) x 24 in. (distance from edge to midpoint), but the solutions uses Wx/2(l-x) where x = l/2. Why do they divide Wx by 2? Isn't that the equation for a triangle?
Thanks.