[attach]109636[/attach]

[attach]109725[/attach] ------------------------------------- rsf = 2.5*10^-2 mq = rho*4pi*rsf³/3 = 153*10^-6*4*pi*(2.5*10^-2)³/3= 1.00138... × 10^-8 C Fx = q*E(r) = q*lambda/(2*pi*eps0*r) = T*sentheta P = mg = ~ 20*10^-3* 9.8 = T*costheta risolvendo nelle incognite T e theta = a [attach]109724[/attach] [attach]109723[/attach] theta = a ≈ 2 (3.14159 n + 0.0207451), T≈0.196169, n element Zper n=0 --->2 (0.0207451) radians ---> 2.3772° (degrees) ---> ok