Question

The charges Q1=Q and Q2=4Q that are a distance d apart, repel each other with a force of 1.60 N. What would be the force between the charges Q3=2Q and Q4=7Q that are a distance d/3 apart?

Answer 1

50.4 N

Step-by-step explanation:

Q1 = Q

Q2 = 4 Q

Distance = d

The force is given by

`F = (KQ_(1)Q_(2))/(d^(2))`

`1.60 = (4KQ^(2))/(d^(2))` .... (1)

Now,

Q3 = 2 Q

Q4 = 7 Q

distance = d/3

`F' = (9KQ_(3)Q_(4))/(d^(2))`

`F' = (126KQ^(2))/(d^(2))` .... (2)

Divide equation (2) by equation (1), we get

F' / 1.60 = 126 / 4

F' = 50.4 N

Thus, the force is 50.4 N.