Two charges of -1 C and 4 C are at points (-2 ,1,8 ) and ( 1,4,-2), respectively. Assuming that both coordinates are in meters, what is the force between the two points?

1 Answer
Oct 7, 2017

3.05*10^8N

Explanation:

Distance between points ->sqrt(118) (source)

According to Coulomb's law,

F=ktimes(abs(q_1)timesabs(q_2))/(r^2)

=>F=(9*10^9"N""m"^2/"C"^2)(abs(-1C)timesabs(4C))/((sqrt(118m))^2)

=>F=(9*10^9"N"cancel("m"^2)/cancel("C"^2))times4cancel("C"^2)/cancel("m"^2)

=>F~~305084745N " OR " 3.05*10^8N