Jaka sila beda odzialywac na siebie, z odleglosci 10 cm, dwa ciala o jednakowych ladunkach, jesli kazdy z nich ma wartosc 2 * 10 (-5)C czyli dwa razy dziesiec do minus piatej potegi ( w coulombach) ;)
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dane:
r =10cm = 0,1m
q1 = q2 = 2 *10^(-5) C
k = 9 *10^9 N*m2/C^2
szukane:
F =?
Z prawa Coulomba:
F = k* q1q2/r^2
F = 9 *10^9 N*m2/C^2 * 2*10^(-5)C *2*10^(-5)C/(0,1m)^2 =
= 9*10^9 * 4*10^(-10)/0,01 = 36 *10^9 *10^(-10)/10^(-2) =
= 36 *10^9 *10^(-8) =36 *10 [N]
F = 360 N
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Odp.Szukana siła to 360N (niutonów)