Two People are holding the ends of a uniform plank of lenth, l and mass, m. Show that if one person suddenly lets go, the load suppored by the other person suddenly drops from mg/2 to mg/4.
The Attempt at a Solution
I have done the first part of the problem. I am have trouble with the second part.
Before Plank Falls:
Fnet = ma = F1 + F2 -Fg = 0 (F1=F2, Fg=mg)
After Plank Falls:
Fnet = ma = F1 - Fg = 0