Question

Two charged particles Q1 and Q2 are a distance r apart with Q2=5Q1.Compare the forces they exert on one another when F1 is the force Q2 exerts on Q1 and F2 is the force Q1 exerts on Q2

a)F2=-5F1
b)F2=5F1
c)F2=F1
d)F2=-F1

Answer 1

a
The force will be five times greater because the charge is five times greater and in the opposite direction, yielding the negative sign.