Two metal spheres are suspended from strings. The
charge on sphere (a) is -2.0*10^2 C and the other (b)-4.0
*10^-8 C. Use the diagram to help you find the electric
force acting on the spheres?
3.0 m
A. An attractive force of 24*10^3 N

B. A repulsive force of 8.0*10^3 N.

C. An attractive force of 8.0*10^3 N

D. A repulsive force of 24*10^3N

B. A repulsive force of 8.0*10^3 N.

Explanation:

As we know by Coulomb's law that the electrostatic force between two charges is given as

here we know that

r = 3.0 m

now we have

since both charges are similar charges so they will repel each other by the force we calculated above so correct answer will be

B. A repulsive force of 8.0*10^3 N.

your answer would be fusion

potential energy is directly proportional to height.

more height = more potential energy.

greatest increase in height = greatest increase in potential energy

where are the points with the greatest increase in height ?

has to be c-e or d-e .