Question

calcule a força eletrostática entre dois balões

qa=2uc Qb= 4uc

d=20cm
k=9x10^9

Answer 1

2uc = 2.10⁻⁶ C

4uc = 4.10⁻⁶ C

20 cm = 0,2 m

Lei de Coulomb

Fel = K.Q1.q2 / d²

Fel = 9.10⁹ . ( 2.10⁻⁶) . ( 4.10⁻⁶)  / (0,2)²

Fel = 0,072 / 0,04  = 1,8 N

Answer 2

Q1= 2μc= 2.10^-6C e   Q2= 4μc = 4.10^-6C

d= 20cm=0,2m∴

F= Q1.Q2.K/d^2∴ F= 2.10^-6.4.10^-6.9.10^9/(2.10^-1)^2∴

F= 72.10^-3/4.10^-2∴ F= 18.10^-3.10^2∴ F= 18.10^-1∴ F=1,8N