That depends what you want to figure out, and what data you are given. One equation that can be relevant for many cases is Newton's Second Law (F=ma, that is, force = mass x acceleration).
That's the force of repulsion between two positive charges; or between two negative charges.
What force is acting? Gravity? Electricity? Magnetic repulsion? And what is the mass/charge on each sphere anyway?
No. I believe you may be thinking of repulsion, which means a force or emotion moving you away from something in a strong or violent manner.No, it is spelled "repulsion".
electric force
an electric force.
The force of attraction or repulsion due to static changes
Physics has identified 4 basic forces (there are endless numbers of forces, but they are all derived from the basic forces) which are, the electromagnetic force, the gravitational force, the strong nuclear force and the weak nuclear force. There is also a force of repulsion caused by what is known as dark energy, which is not well understood and which may or may not involve some other type of force.
That's the force of repulsion between two positive charges; or between two negative charges.
It is the force of electrostatic repulsion.
What force is acting? Gravity? Electricity? Magnetic repulsion? And what is the mass/charge on each sphere anyway?
Electric force of repulsion.
True.
No. I believe you may be thinking of repulsion, which means a force or emotion moving you away from something in a strong or violent manner.No, it is spelled "repulsion".
electric force
electric force
The difference is in the direction.
an electric force.