1. vp Fa
mac = md mg Þ ac = md g
RFa mg
Vcm (t) = md gt
md mgr 2 md mgr 2 md g
Iw = Fa r = md mgr Þ w =
= =
I mr 2 r
2 md g
w = w0 + t
r
m
-Fa = MA Þ - m g=A
M d
m
V =- md gt
M
m m m
V 1 = Vc - Vt = Vc +
cm md gt = md gt + md gt = md g(1- )t
M M M
m
Da qui mi posso ricavare il tempo Vcm = -w r Þ md g(1- )t = w 0 r - 2 md gt
1
M